Persepolis: Khan Academy, Persepolis Historical Facts and Pictures, Persian Architecture in Photos, and More

Persepolis: Khan Academy, Persepolis Historical Facts and Pictures, Persian Architecture in Photos, and More

Khan Academy

Persepolis: The Audience Hall of Darius and Xerxes

by Dr. Jeffrey Becker. Created by Smarthistory.

Growth of the Achaemenid Empire under different kings (underlying map © Google)

By the early fifth century B.C.E. the Achaemenid (Persian) Empire ruled an estimated 44% of the human population of planet Earth. Through regional administrators the Persian kings controlled a vast territory which they constantly sought to expand. Famous for monumental architecture, Persian kings established numerous monumental centers, among those is Persepolis (today, in Iran). The great audience hall of the Persian kings Darius and Xerxes presents a visual microcosm of the Achaemenid empire—making clear, through sculptural decoration, that the Persian king ruled over all of the subjugated ambassadors and vassals (who are shown bringing tribute in an endless eternal procession).

Kylix depicting a Greek hoplite slaying a Persian inside, by the Triptolemos painter, 5th century B.C.E. (National Museums of Scotland)

Persepolis would remain an important site until it was sacked, looted, and burned under Alexander the Great of Macedon in 330 B.C.E.

Plan of Persepolis (underlying image: Oriental Institute Museum via Google Arts and Culture)

Bull Capital from Persepolis, Ap?dana, Persepolis (Fars, Iran), c. 520–465 B.C.E. (National Museum of Iran) (photo: s1ingshot)

The Ap?dana palace is a large ceremonial building, likely an audience hall with an associated portico. The audience hall itself is hypostyle in its plan, meaning that the roof of the structure is supported by columns. Ap?dana is the Persian term equivalent to the Greek hypostyle (Ancient Greek: ????????? hypóst?los). The footprint of the Ap?dana is c. 1,000 square meters; originally 72 columns, each standing to a height of 24 meters, supported the roof (only 14 columns remain standing today). The column capitals assumed the form of either twin-headed bulls (above), eagles or lions, all animals represented royal authority and kingship.

Ap?dana, Persepolis (Fars, Iran), c. 520–465 B.C.E. (photo: Alan Cordova, CC BY-NC-ND 2.0)

19th century reconstruction of the Ap?dana, Persepolis (Fars, Iran) by Charles Chipiez (photo: Pentocelo~commonswiki, public domain)

East stairway, Ap?dana, Persepolis (Fars. Iran), c. 520–465 B.C.E.

The Ap?dana stairs and sculptural program

The monumental stairways that approach the Ap?dana from the north and the east were adorned with registers of relief sculpture that depicted representatives of the twenty-three subject nations of the Persian empire bringing valuable gifts as tribute to the king. The sculptures form a processional scene, leading some scholars to conclude that the reliefs capture the scene of actual, annual tribute processions—perhaps on the occasion of the Persian New Year–that took place at Persepolis. The relief program of the northern stairway was perhaps completed c. 500–490 B.C.E. The two sets of stairway reliefs mirror and complement each other. Each program has a central scene of the enthroned king flanked by his attendants and guards.

even reflecting events that took place within the Ap?dana itself.

An Armenian tribute bearer carrying a metal vessel with Homa (griffin) handles, relief from the eastern stairs of the Ap?dana in Persepolis: (Fars. Iran), c. 520–465 B.C.E.   (photo: Aryamahasattva, CC BY-SA 3.0)

The relief program of the Ap?dana serves to reinforce and underscore the power of the Persian king and the breadth of his dominion. The motif of subjugated peoples contributing their wealth to the empire’s central authority serves to visually cement this political dominance. These processional scenes may have exerted influence beyond the Persian sphere, as some scholars have discussed the possibility that Persian relief sculpture from Persepolis may have influenced Athenian sculptors of the fifth century B.C.E. who were tasked with creating the Ionic frieze of the Parthenon in Athens. In any case, the Ap?dana, both as a building and as an ideological tableau, make clear and strong statements about the authority of the Persian king and present a visually unified idea of the immense Achaemenid empire.

For more information, please visit the following link:

https://www.khanacademy.org/humanities/ap-art-history/ancient-mediterranean-ap/ancient-near-east-a/a/persepolis

Persepolis Historical Facts and Pictures

Situated 70 kilometers northeast from Shiraz city in Iran, the Persepolis was once the capital of the Achaemenid Empire. Now among one of the World Heritage Centers, Persepolis literally means “city of Persians”.

Persepolis Map

Persepolis Map

Persepolis Photos

Persepolis

Architecture

Now in a ruined condition, this historical structure exhibits Achaemenid architectural style.  This 40 ft. high and 100 ft. wide complex is occupied with multiple halls, a wide terrace, corridors and a symmetrical stairway leading to the top.  The stairway delineates various literal and metaphorical relief scenes. The terrace displays inscriptions that prove Darius the great was the initiator of building this historical complex.

Persepolis Images

Persepolis Pictures

Ruins

The wide terrace comprises a number of gigantic ruined buildings, composed of grey dark marble. These ruins, now known as Takht e Jamshid, were known as Chehel Minar (the 40 pillars) in the thirteenth century. Three catacombs of rock are located behind the Takht-e-Jamshid.

Perspolis Chehel Minar

Takht e Jamshid

Interiors of Persepolis

The complex contains various halls and chambers inside its structure that include the Hall of Apadana, Tachar, Hadish, Talar-i-Takht, Darwazeh-i-Mellal, the Khazaneh, and Naksh-e-Rustam. The most spectacular hall of the complex, the Apadana Hall, comprising 36 columns is also the largest hall within the structure. The structure was built with square based fluted columns and mud brick walls. Tachar was the private chamber of Darius the great. The later addition Hardish was the private chamber of emperor Xerexes the Great. Tala-i-Takht, comprising 100 columns, served as the hall of throne.  The royal treasury or Khazaneh is preserved in a palace complex that was later developed by Artaxerexes III. The Naksh-e-Rustam is occupied with the tombs of the kings.

Persepolis Darwazeh-i-Mellal

Persepolis Hall of Apadana

Persepolis Naksh-e-Rustam

Persepolis Tachar

The site of Persepolis is an embodiment of past grandeur. Although in a ruined state today this majestic structure still has no equivalence and represents a distinct quality of an ancient civilization.

Quick Info

Founded: 6th century BCE
Periods: Achaemenid Empire
Cultures: Persian
Location and Address: Fars Province, Iran
Type: Settlement
Condition: In ruins
Attributes: UNESCO World Heritage Site
Website: http://whc.unesco.org/en/list/114

For more information, please visit the following link:

https://www.thehistoryhub.com/persepolis-facts-pictures.htm

For more information, please visit the following link:

https://golshanhouse.com/index.php/tours/

University of Chicago

Oblique aerial view of the terrace of Persepolis from the northwest, taken during an aerial survey expedition in Iran.

View of the eastern stairway and columns of the Apadana (Audience Hall) at Persepolis, Iran, 5th century B.C.

Winged sphinx from the Palace of Darius, Persepolis, Iran, 5th century B.C

For more information, please visit the following link:

https://news.uchicago.edu/story/exhibit-features-archival-images-persepolis-royal-complex-ancient-persia

Persian Architecture in Photos: Reliefs of Persepolis

By IFP Editorial Staff

January 2, 2020

The reliefs that adorn the ancient palaces of Persepolis are considered to be among the most prominent remaining antiquities in the world.

Extensive study is required to discover the secrets of considerable quantity and quality of the ancient complex’ reliefs.

Up to this date, however, no valid stylistic analysis on them has been published.

What follows are Fars News Agency’s photos of Persepolis reliefs:

For more information, please visit the following link:

https://ifpnews.com/persian-architecture-in-photos-reliefs-of-persepolis/

More Photos from my site in Pinterest

Ing’s comments

“Persepolis would remain an important site until it was sacked, looted, and burned under Alexander the Great of Macedon in 330 B.C.E.” Khan Academy  

I was very impressed with the construction of Persepolis, especially the artwork created.  I can imagine how busy the workers, artists, architectures and others who were involved in building this monument must have been.  Undoubtedly there was a big ceremony for the opening of the beautiful and unique complex.  Music in the air, and entertainment performed, with laughter and happy conversations making Persepolis come alive for the festive occasion.    

As I studied Persepolis History and discovered that it was burned and destroyed by Alexander the Great of Macedon.  It is sad that humans learn to fight and destroy others in order to gain power and wealth from looting.  This is the same as the Burmese (Myanmar) king burning and looting Ayutthaya, the second capital of Siam (Thailand) in 1767. 

There are wars in every part of the world, especially now, between Russia and Ukraine.  Putin still behaves in a similar way to aggressive leaders of past civilizations.  His greediness makes him forget humanity.  Ukraine is being destroyed by Putin’s bombs. Ukrainian civilians and soldiers have been killed by the thousands.  Putin is sending his Russian soldiers to be killed in even greater numbers.  I do not see the sense of Putin’s behave.  He is the only one causing all this destruction and no one on earth can do anything about it.  I can hardly believe that such a human still exists in this 21st century.  Where is the UN organization and the individual countries that call themselves developed and civilized.  Putin has been able to cultivate, gather power, and wealth, for himself for more than 20 years.  No one in Russia can oppose Putin if they think differently to him.  Those who oppose him will be jailed or killed. 

In the United States, Trump who considered himself a good friend of Putin and Kim Jong-un, the dictator of North Korea, has similar hunger for absolute power and wealth.  This also may apply to some Republican law makers in Congress obey and follow Trump.  Even if Trump does not regain the presidency, these Republican lawmakers can still take the presidency, and gain sufficient control of the government to destroy American democracy forever.  

Do we vote for the price of food in super markets or for freedom to keep democracy for the country and for future generations?

Ing-On Vibulbhan-Watts, Monday, December 5, 2022

A Brief History of the Ancient Ruins of Ayutthaya in Thailand

https://theculturetrip.com/asia/thailand/articles/a-brief-history-of-the-ancient-ruins-of-ayutthaya-in-thailand/

Go to the top

PBS News, NBC Nightly News, LiveScience, TED, TED-ED, Khan Academy, DNA Learning Center, Amoeba Sisters

PBS News, NBC Nightly News, LiveScience, TED, TED-ED, Khan Academy, DNA Learning Center, Amoeba Sisters

PBS NewsHour live episode, Aug. 4, 2021

PBS NewsHour full episode, July 30, 2021

NBC Nightly News Broadcast (Full) – August 4th, 2021

NBC Nightly News Broadcast (Full) – July 30th, 2021

LiveScience: Nerve damage in cornea could be sign of ‘long COVID,’ study hints

Will we ever find COVID-19’s ‘Patient Zero?’

The real reason CDC is updating their mask guidelines

Dozens of medical groups urge COVID-19 vaccination mandates for health workers

TED: Ugur Sahin and Ozlem Tureci meet the scientist couple driving an mRNA vaccine revolution

Kiran Mazumdar Shaw the global cooperation that accelerated the covid 19 vaccines#t-907680

TED-ED: Dan Kwartler How fast can a vaccine be made

Alex Rosenthal:  When is a pandemic over?

Elizabeth Cox:  what is a coronavirus?

Alex Rosenthal and Pall Thordarson:  Which is better soap or hand sanitizer? #t-217130

Emma Bryce:  How does the immune system work?

Khan Academy:  Translation (mRNA to protein) | Biomolecules | MCAT | Jun 7, 2016 

mRNA Translation (Basic), Mar 22, 2010  DNA Learning Center

DNA vs RNA (Updated), Aug 29, 2019  Amoeba Sisters

Protein Synthesis (Updated), Jan 18, 2018  Amoeba Sisters

LiveScience: Strange DNA ‘borgs’ discovered in California

DeepMind says it can predict the shape of every protein in the human body

Horny sponges that lived nearly 1 billion years ago may be the earliest animals on Earth

Ignoring climate change will yield ‘untold suffering,’ panel of 14,000 scientists warns

Iceland may be the tip of a sunken continent

PBS NewsHour live episode, Aug. 4, 2021

Unlisted

Streamed live 7 hours ago, 8.4.2021  PBS NewsHour

Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG Find more from PBS NewsHour at https://www.pbs.org/newshour Subscribe to our YouTube channel: https://bit.ly/2HfsCD6

PBS NewsHour full episode, July 30, 2021

Jul 30, 2021 PBS NewsHour

Friday on the NewsHour, as new data from the Centers for Disease Control and Prevention exposes how infectious and dangerous the COVID variant of the coronavirus is, we discuss the science. Then, Afghan interpreters arrive on U.S. shores, finding safety after risking it all to help America during the war. And, China tightens its grip on Hong Kong by closing the border to prevent a mass exodus. WATCH TODAY’S SEGMENTS What to know about the CDC’s delta variant study https://www.youtube.com/watch?v=gu5DV… News Wrap: Trump tax returns must go to Congress, DOJ says https://www.youtube.com/watch?v=K3UhD… First Afghan interpreters, their families arrive in the U.S. https://www.youtube.com/watch?v=rZ4Aj… CIA still investigating U.S. diplomats’ ‘Havana Syndrome’  https://www.youtube.com/watch?v=-ypQl… Hong Kong residents worry immigration law may ban their exit https://www.youtube.com/watch?v=8W2JR… Brooks and Dionne on vaccine hesitancy, Jan. 6 hearings https://www.youtube.com/watch?v=bByPE… Lessons from McDonald’s’ investment in Black neighborhoods https://www.youtube.com/watch?v=E2lQX… A Brief But Spectacular take on reducing sexism in science https://www.youtube.com/watch?v=6asps… Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG Find more from PBS NewsHour at https://www.pbs.org/newshour Subscribe to our YouTube channel: https://bit.ly/2HfsCD6

NBC Nightly News Broadcast (Full) – August 4th, 2021

Aug 4, 2021  NBC News

Pfizer vaccine could get final FDA approval by September, growing calls for Gov. Cuomo to resign or be impeached, and surviving trees from Hiroshima garden remain powerful symbol after atomic blasts. Watch “NBC Nightly News With Lester Holt” at 6:30 p.m. ET / 5:30 p.m. CT (or check your local listings). 00:00 Intro 01:48 FDA Fast Tracks Vaccine Approval 05:53 Cuomo Facing Impeachment? 08:05 Airline Chaos 08:56 Record Border Surge 11:25 New Eviction Moratorium 13:16 Violent Clashes In Beirut 14:44 Hiroshima Anniversary » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews Connect with NBC Nightly News online! NBC News App: https://smart.link/5d0cd9df61b80 Breaking News Alerts: https://link.nbcnews.com/join/5cj/bre… Visit NBCNightlyNews.com: https://nbcnews.to/2wFotQ8 Find Nightly News on Facebook: https://bit.ly/2TZ1PhF Follow Nightly News on Twitter: https://bit.ly/1yFY2s4 Follow Nightly News on Instagram: https://bit.ly/2tEncJD NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features NBCNews.com, MSNBC.com, TODAY.com, Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. #NBCNews #Covid #Cuomo

NBC Nightly News Broadcast (Full) – July 30th, 2021

Jul 30, 2021  NBC News

CDC releases new evidence on delta variant, tornado damage across multiple states, and President Trump asked DOJ to declare 2020 election “corrupt.” Watch “NBC Nightly News With Lester Holt” at 6:30 p.m. ET / 5:30 p.m. CT (or check your local listings). 00:00 Intro 02:00 CDC: The ‘War’ Has Changed With Delta Variant 04:41 Breakthrough Infections 07:25 Tornado Outbreak 08:48 Trump Election Bombshell 10:14 Migrant Children Covid Outbreak 13:00 Christmas In July » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews Connect with NBC Nightly News online! NBC News App: https://smart.link/5d0cd9df61b80 Breaking News Alerts: https://link.nbcnews.com/join/5cj/bre… Visit NBCNightlyNews.com: https://nbcnews.to/2wFotQ8 Find Nightly News on Facebook: https://bit.ly/2TZ1PhF Follow Nightly News on Twitter: https://bit.ly/1yFY2s4 Follow Nightly News on Instagram: https://bit.ly/2tEncJD NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features NBCNews.com, MSNBC.com, TODAY.com, Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. #NBCNews #Covid #Trump

TOP SCIENCE NEWS
Nerve damage in cornea could be sign of ‘long COVID,’ study hints

(Shutterstock)

Nerve damage and a buildup of immune cells in the cornea may be a sign of “long COVID,” a long-term syndrome that emerges in some people after COVID-19 infection, a new study suggests.

These preliminary results will need to be verified in a larger group of people with long COVID, or COVID-19 long-haulers, as they’re known, an expert told Live Science. But the findings do hint at something scientists already suspected: Some symptoms of long COVID emerge due to peripheral nerve damage, she said.

Full Story: LiveScience (7/26)

COVID-19
Will we ever find COVID-19’s ‘Patient Zero?’

(KATERYNA KON/SCIENCE PHOTO LIBRARY via Getty Images)

Chinese officials have rejected a World Health Organization proposal to investigate the origins of the novel coronavirus that causes COVID-19, raising new questions about whether the world will ever learn when, where and how the coronavirus (SARS-CoV-2) made the leap into humans.

Without Chinese cooperation, scientists will face frustrating gaps in the data that may keep them from identifying the moment the pandemic began. However, the virus itself does hold clues to its own origin. In the coronavirus’s genetic blueprint is a history of where it came from and how long it took to cause the outbreak that led to a global catastrophe.

Full Story: LiveScience (7/27)

The real reason CDC is updating their mask guidelines

 
(Shutterstock)

On Tuesday (July 27), the Centers for Disease Control and Prevention (CDC) updated their mask guidance, saying fully vaccinated people should resume wearing masks in public indoor spaces if there is substantial coronavirus transmission in their area.

Data from the U.S. and other countries indicates that some vaccinated people infected with the delta variant may be contagious and spread the virus to others. Still, breakthrough infections are uncommon and most coronavirus transmission is occurring through unvaccinated individuals, Dr. Rochelle Walensky, the CDC director said.

Full Story: LiveScience (7/27)

Dozens of medical groups urge COVID-19 vaccination mandates for health workers

(Ben Hasty/MediaNews Group/Reading Eagle via Getty Images)

More than 50 U.S. medical groups, representing millions of health care professionals, are calling for mandatory COVID-19 vaccinations for all health and long-term care workers, according to news reports.

A vaccination mandate “is the logical fulfillment of the ethical commitment of all health care workers to put patients as well as residents of long-term care facilities first and take all steps necessary to ensure their health and well-being,” according to a joint statement released by the medical organizations.

Full Story: LiveScience (7/26)

COVID-19
‘The war has changed,’ against new delta variant, internal CDC presentation says

(Shutterstock)

The coronavirus delta variant may be as contagious as chickenpox and cause more severe illness than previous variants, according to an internal presentation from the Centers for Disease Control and Prevention (CDC).

Vaccines continue to be highly effective, especially at preventing severe illness and death, but may be less effective at preventing infection or transmission of the delta variant, according to the internal report.

Full Story: LiveScience (7/30)

As COVID-19 spread, BioNTech cofounders U?ur ?ahin and Özlem Türeci had one goal: to make a safe, effective vaccine faster than ever before. In this illuminating conversation with head of TED Chris Anderson, the immunologists (and married couple) share the fascinating story of how their decades of mRNA research powered the Pfizer-BioNTech vaccine — and forecast what this breakthrough science could mean for the future of vaccines and other immunotherapy treatments.

This talk was presented at an official TED conference, and was featured by our editors on the home page.

ABOUT THE SPEAKERS

U?ur ?ahin · Physician, immunologist

U?ur ?ahin is the cofounder and CEO of BioNTech and one of the world’s foremost experts on messenger ribonucleic acid (mRNA) medicines. He initiated the historic development of the first mRNA vaccine for COVID-19.

Özlem Türeci · Physician, immunologist, cancer researcher

Özlem Türeci is the cofounder and chief medical officer of BioNTech. She leads the clinical development of “Project Lightspeed,” the company’s successful effort to develop and distribute an mRNA-based vaccine against COVID-19, a historic achievement completed in less than one year.

TEDMonterey | August 2021

Related tags

(This virtual conversation, hosted by TED technology curator Simone Ross, was recorded March 12, 2021.) Biotech entrepreneur Kiran Mazumdar-Shaw shares lessons learned from the global effort to develop COVID-19 vaccines: namely, the power of collaboration and the importance of equitable access to health care. Learn more about the innovative partnerships that helped create the vaccines — and how India became a crucial player in the supply chain delivering millions of doses to the world.

This talk was presented at a TED Institute event given in partnership with BCG. Read more about the TED Institute.

ABOUT THE SPEAKERS

Kiran Mazumdar-Shaw · Biotech entrepreneur

Kiran Mazumdar-Shaw is a biotech entrepreneur, health care visionary, global influencer and passionate philanthropist.

Simone Ross · TED technology curator

Simone Ross has spent her career observing companies, individuals and ideas at the intersection of tech, the economy and society.

TAKE ACTION

LEARN

Learn more about Kiran Mazumdar-Shaw’s work and thoughts on innovation.

Learn more ?

ABOUT TED INSTITUTE

Every year, TED works with a group of select companies and foundations to identify internal ideators, inventors, connectors, and creators. Drawing on the same rigorous regimen that has prepared speakers for the TED main stage, TED Institute works closely with each partner, overseeing curation and providing intensive one-on-one talk development to sharpen and fine tune ideas. The culmination is an event produced, recorded, and hosted by TED, generating a growing library of valuable TED Talks that can spur innovation and transform organizations.

Learn more about TED Institute

TED@BCG | March 2021

Related tags

When a new pathogen emerges, our bodies and healthcare systems are left vulnerable. And when this pathogen causes the outbreak of a pandemic, there’s an urgent need for a vaccine to create widespread immunity with minimal loss of life. So how quickly can we develop vaccines when we need them most? Dan Kwartler describes the three phases of vaccine development. [Directed by Good Bad Habits, narrated by Jack Cutmore-Scott, music by Landon Trimble / Playdate Audio].

MEET THE EDUCATOR

Dan Kwartler · Educator

ABOUT TED-ED

TED-Ed Original lessons feature the words and ideas of educators brought to life by professional animators.

Consider the following scenario: a highly infectious, sometimes deadly respiratory virus infects humans for the first time. It spreads rapidly worldwide, and the WHO declares a pandemic. The death toll starts to rise and everyone is asking the same question: when will the pandemic end? Alex Rosenthal details the three main strategies governments can use to contain and end a pandemic. [Directed by Visorama, narrated by Jack Cutmore-Scott, music by Bamm Bamm Wolfgang].

MEET THE EDUCATOR

Alex Rosenthal · Producer

Alex Rosenthal takes everyday experiences and turns them into mind-bending puzzles.

ABOUT TED-ED

TED-Ed Original lessons feature the words and ideas of educators brought to life by professional animators.

5,549,863 views

TED-Ed | June 2020

Related tags

For almost a decade, scientists chased the source of a deadly new virus through China’s tallest mountains and most isolated caverns. They finally found it in the bats of Shitou Cave. The virus in question was a coronavirus that caused an epidemic of severe acute respiratory syndrome, or SARS, in 2003. So what exactly is a coronavirus, and how does it spread? Elizabeth Cox explains. [Directed by Anton Bogaty, narrated by Bethany Cutmore-Scott, music by Jarrett Farkas].

MEET THE EDUCATOR

Elizabeth Cox · Educator

ABOUT TED-ED

TED-Ed Original lessons feature the words and ideas of educators brought to life by professional animators.

Your hands, up close, are anything but smooth. With peaks and valleys, folds and rifts, there are plenty of hiding places for a virus to stick. If you then touch your face, the virus can infect you. But there are two extraordinarily simple ways you can keep that from happening: soap and water, and hand sanitizer. So which is better? Alex Rosenthal and Pall Thordarson investigate. [Directed by Artrake Studio, narrated by Addison Anderson].

MEET THE EDUCATORS

Alex Rosenthal · Producer

Alex Rosenthal takes everyday experiences and turns them into mind-bending puzzles.

Pall Thordarson · Educator

ABOUT TED-ED

TED-Ed Original lessons feature the words and ideas of educators brought to life by professional animators.

Inside you, a daily battle is being waged and your immune system is at the frontline. Most of the time, you may not even notice it’s there, but over the course of your life your immune system will guard you against hundreds of potentially fatal threats. Emma Bryce explores the different components of this system and how, together, they do their vital work. [Directed by Felipe Grosso & Odirlei Seixas, narrated by Addison Anderson, music by Vadeco Schettini].

MEET THE EDUCATOR

Emma Bryce · Educator

ABOUT TED-ED

TED-Ed Original lessons feature the words and ideas of educators brought to life by professional

Translation (mRNA to protein) | Biomolecules | MCAT | Khan Academy

850,192 views

Jun 7, 2016  Khan Academy

A deep dive into how mRNA is translated into proteins with the help of ribosomes and tRNA. Watch the next lesson: https://www.khanacademy.org/test-prep… Missed the previous lesson? https://www.khanacademy.org/test-prep… MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We’ve also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK… Subscribe to Khan Academy: https://www.youtube.com/subscription_…

mRNA Translation (Basic)

Mar 22, 2010  DNA Learning Center

Originally created for DNA Interactive ( http://www.dnai.org ). TRANSCRIPT: When the RNA copy is complete, it snakes out into the outer part of the cell. Then in a dazzling display of choreography, all the components of a molecular machine lock together around the RNA to form a miniature factory called a ribosome. It translates the genetic information in the RNA into a string of amino acids that will become a protein. Special transfer molecules, the green triangles, bring each amino acid to the ribosome. The amino acids are the small red tips attached to the transfer molecules. There are different transfer molecules for each of the twenty amino acids. Each transfer molecule carries a three letter code that is matched with the RNA in the machine. Now we come to the heart of the process. Inside the ribosome, the RNA is pulled through like a tape. The code for each amino acid is read off, three letters at a time, and matched to three corresponding letters on the transfer molecules. When the right transfer molecule plugs in, the amino acid it carries is added to the growing protein chain. Again, you are watching this in real time. And after a few seconds the assembled protein starts to emerge from the ribosome. Ribosomes can make any kind of protein. It just depends what genetic message you feed in on the RNA. In this case, the end product is hemoglobin. The cells in our bone marrow churn out a hundred trillion molecules of it per second! And as a result, our muscles, brain and all the vital organs in our body receive the oxygen they need.

DNA vs RNA (Updated

1,495,503 views  Aug 29, 2019  Amoeba Sisters

Why is RNA just as cool as DNA? Join the Amoeba Sisters as they compare and contrast RNA with DNA and learn why DNA should be sharing the limelight! Video has updated handout here https://www.amoebasisters.com/handouts and is updated from the old version of this video: https://youtu.be/0Elo-zX1k8M Table of Contents: 00:00 Intro 0:54 Similarities of DNA and RNA 1:35 Contrasting DNA and RNA 2:22 DNA Base Pairing 2:40 RNA Base Pairing 2:57 mRNA, rRNA, and tRNA 4:06 Quick Quiz! Factual Reference: OpenStax Biology 2nd Edition, Biology 2e. OpenStax CNX. Aug 19, 2019 http://cnx.org/contents/8d50a0af-948b…. ****Further Reading Suggestions******************************** -Why did we say DNA is “generally” double stranded and RNA is “generally” single-stranded? Check out these fascinating exceptions! https://www.ncbi.nlm.nih.gov/pmc/arti… -What do we mean when we encouraged exploring the chirality of DNA—and other important characteristics—that our cartoons cannot show well? Check out https://www.nature.com/scitable/topic… -RNA World Hypothesis? Here is a great resource from NOVA to learn more: https://www.pbs.org/wgbh/nova/labs/la… *************************************************************** The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky’s certification and experience in teaching biology at the high school level. Learn more about our videos here: https://www.amoebasisters.com/our-videos Support Us? https://www.amoebasisters.com/support-us Our Resources: Biology Playlist: https://www.youtube.com/playlist?list… GIFs: https://www.amoebasisters.com/gifs.html Handouts: https://www.amoebasisters.com/handout… Comics: https://www.amoebasisters.com/paramec… Unlectured Series: https://www.amoebasisters.com/unlectured Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasiste… Visit our Redbubble store at https://www.amoebasisters.com/store TIPS FOR VIEWING EDU YOUTUBE VIDEOS: Want to learn tips for viewing edu YouTube videos including changing the speed, language, viewing the transcript, etc? https://www.amoebasisters.com/pinkys-… MUSIC: Our intro music designed and performed by Jeremiah Cheshire. End music in this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/… COMMUNITY: We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube’s community guidelines and how YouTube handles comments that are reported by the community. We also reserve the right to remove comments. TRANSLATIONS: While we don’t allow dubbing of our videos, we do gladly accept subtitle translations from our community. Some translated subtitles on our videos were translated by the community using YouTube’s community-contributed subtitle feature. After the feature was discontinued by YouTube, we have another option for submitting translated subtitles here: https://www.amoebasisters.com/pinkys-… We want to thank our amazing community for the generosity of their time in continuing to create translated subtitles. If you have a concern about community contributed contributions, please contact us.

Protein Synthesis (Updated)

3,653,242 views

Jan 18, 2018  Amoeba Sisters

Explore the steps of transcription and translation in protein synthesis! This video explains several reasons why proteins are so important before explaining the roles of mRNA, rRNA, and tRNA in the steps of protein synthesis! Expand details for contents and resources. ?Video handouts and resources on http://www.amoebasisters.com/handouts. This video replaces our old protein synthesis video: https://youtu.be/h5mJbP23Buo Table of Contents: 00:00 Intro 0:46 Why are proteins important? 1:48 Introduction to RNA 2:22 Steps of Protein Synthesis 2:43 Transcription 3:54 Translation 6:08 Introduction to mRNA Codon Chart 7:51 Quick Summary Image Vocabulary in this video includes DNA, mRNA, rRNA, and tRNA. This video mentions that proteins can be made of 1 or more polypeptide chains and that proteins typically experience folding and other modifications (to be functional proteins.) Codons and the amino acids they code for are represented by standard charts that can be found in the public domain. While the rectangle chart is the common format, there may be other ways to represent the information. P.S. If learning about mutations, check out this cool codon chart that includes mutations(!!) in the public domain: https://commons.wikimedia.org/wiki/Fi… Our videos are designed to introduce basic concepts and hopefully to inspire students to stay curious about the content. We simply cannot include all of the exceptions and minute details in a video under 10 minutes, and this is why we so frequently remind people of this in our videos. We want students to go beyond our videos to explore the depth of the material. P.S. On our website, we emphasize that our videos contain science comics- not scientific illustrations. In real life, amoebas don’t look like our characters. Our illustrated cell cartoons are definitely not to scale. Nitrogen and carbon don’t tap dance. DNA is right-handed (but there are exceptions- worth a google) and doesn’t have eyes…a face…or a top hat… Learn more about the purpose of our videos here: http://www.amoebasisters.com/our-vide… The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky’s certification and experience in teaching biology at the high school level. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us… We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/bi… Support Us? https://www.amoebasisters.com/support-us Our Resources: Biology Playlist: https://www.youtube.com/playlist?list… GIFs: https://www.amoebasisters.com/gifs.html Handouts: https://www.amoebasisters.com/handout… Comics: https://www.amoebasisters.com/paramec… Unlectured Series: https://www.amoebasisters.com/unlectured Connect with us! Website: https://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasiste… Visit our Redbubble store at https://www.amoebasisters.com/store TIPS FOR VIEWING EDU YOUTUBE VIDEOS: Want to learn tips for viewing edu YouTube videos including changing the speed, language, viewing the transcript, etc? https://www.amoebasisters.com/pinkys-… MUSIC: Music in this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/… COMMUNITY: We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube’s community guidelines and how YouTube handles comments that are reported by the community. We also reserve the right to remove comments. TRANSLATIONS: While we don’t allow dubbing of our videos, we do gladly accept subtitle translations from our community. Some translated subtitles on our videos were translated by the community using YouTube’s community-contributed subtitle feature. After the feature was discontinued by YouTube, we have another option for submitting translated subtitles here: https://www.amoebasisters.com/pinkys-… We want to thank our amazing community for the generosity of their time in continuing to create translated subtitles. If you have a concern about community contributed contributions, please contact us.

BIOLOGY
Strange DNA ‘borgs’ discovered in California

(Shutterstock)

Scientists accidentally discovered a mysterious — and unusually large — DNA structure deep in the mud in California wetlands. The structure, known as a “Borg,” likely belongs to a single-celled organism and carries many genes that are unknown to science. It’s not totally clear what these massive strings of DNA do, but they may help supercharge the organisms’ ability to break down chemicals in the soil.

Full Story: LiveScience (7/29)

YOUR BODY
DeepMind says it can predict the shape of every protein in the human body

(JUAN GAERTNER/SCIENCE PHOTO LIBRARY via Getty Images)

The artificial intelligence (A.I.) company DeepMind says it will soon release a database of the shape of every protein known to science — more than 100 million.

That’s every structured protein in the human body, as well as in 20 research species, including yeast and E. coli bacteria, fruit flies and mice. Prior to the company’s AlphaFold project, which uses artificial intelligence to predict protein shapes, only 17% of the proteins in the human body had their structures identified, according to Technology Review.”It looks astonishingly impressive,” Tom Ellis, a synthetic biologist at Imperial College London, told Technology Review.

Full Story: LiveScience (7/29)

CURIOUS CREATURES
Horny sponges that lived nearly 1 billion years ago may be the earliest animals on Earth

(Elizabeth Turner, Laurentian University)

That sea sponge hanging in your shower may be able to trace its evolutionary lineage to nearly a billion years ago, according to fossils that could be the oldest examples of animal life on Earth.

The 890-million-year-old fossils of what may be ancient sponges were found in Canada’s Northwest Territories, and their tiny and delicately branching tendrils are invisible to the naked eye. But under a microscope, the preserved organic tissue revealed a mesh-like structure that was strikingly similar to that of skeleton fibers in modern bath sponges, which are part of a soft-bodied-sponge group known as keratose demosponges, or horny sponges.

Full Story: LiveScience (7/28)

TOP SCIENCE NEWS
Ignoring climate change will yield ‘untold suffering,’ panel of 14,000 scientists warns

(NASA)

Nearly 14,000 scientists have signed a new climate emergency paper, warning that “untold suffering” awaits the human race if we don’t start tackling global warming head-on, effective immediately.

Earth’s vitals have only deteriorated over the last two years, with 18 of the report’s 31 categories showing new all-time record highs or lows, the authors wrote. Greenhouse gas emissions are at an all-time high, while glacial ice thickness is at its lowest point in 71 years of record keeping, the report found. The world is richer than it’s ever been (measured by global GDP), while the sky is more polluted than ever (measured by carbon dioxide, methane and nitrous oxide concentrations in the atmosphere).

Full Story: LiveScience (7/28)

AMAZING EARTH
Iceland may be the tip of a sunken continent

(Norbert Figueroa / EyeEm via Getty Images)

Iceland may be the last exposed remnant of a nearly Texas-size continent — called Icelandia — that sank beneath the North Atlantic Ocean about 10 million years ago, according to a new theory proposed by an international team of geophysicists and geologists.

The theory goes against long-standing ideas about the formation of Iceland and the North Atlantic, but the researchers say the theory explains both the geological features of the ocean floor and why Earth’s crust beneath Iceland is so much thicker than it should be. Outside experts not affiliated with the research told Live Science they are skeptical that Icelandia exists based on the evidence collected so far.

Full Story: LiveScience (7/28)

 Go to the top