Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://www.ted.com/lessons/the-science-of-smog-kim-preshoff

Explore the intertwined histories and cultures of the major religions: Hinduism, Judaism, Buddhism, Christianity and Islam. It's perfectly human to grapple with questions, like "Where do we come from?" and "How do I live a life of meaning?" These existential questions are central to the five

Explore the innovative ways countries are revolutionizing farming to ensure we can feed humanity in a way that works with the environment.

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About 10,000 years ago, humans began to farm. This agricultural revolution was a turning point in our history and enabled the existence of civilization. Today, nearly 40% of our planet is farmland. Spread all over the world, these lands are the pieces to a global puzzle we’re all facing: in the future, how can we feed every member of a growing population a healthy diet? Brent Loken investigates.

Lesson by Brent Loken, directed by Hype CG.

Animator's website: https://www.hype.cg/ & https://www.luisacopetti.com/
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Thank you so much to our patrons for your support! Without you this video would not be possible! JackKeyton, Matthew D. Vigil, Amin Shahril, Adriano Fontes, Xiao Yu, Fatima Kried, Aravind Battaje, Melissa Suarez, Jason Duncan, Brian A. Dunn, Francisco Amaya, Daisuke Goto, Matt Switzler, Chhunheng Veng, Leonardo Monrroy, Sumedh Ghaisas, Guhten, Amer Harb, Dowey Baothman, Norbert Orgován, Shafeeq Ansari, Gabriel Balsa, Maryam Sultan, Bethany Connor, Jeremy Shimanek, Adam Foreman, Sebastiaan Vleugels, Lâm Nguyễn, Mark Byers, Bradley Heinold, Monkeypatcher, Laurence McMillan, Connor Roberts, Dmitry Neverov, Tonya Ratliff-Garrison, Avinash Amarnath, Eric McDaniel, Cristian Cristian, France Lipužič, EdoKun, Rare Media, Rayo, Faizan, Elizabeth Gu, Nazmul Idris, Po Foon Kwong, Siobhan O'Connor Gwozdz, NinjaBoffin, Jesse Jurman and Josue Perez Miranda.

Can we eat to starve cancer? William Li presents a new way to think about treating cancer and other diseases: anti-angiogenesis, preventing the growth of blood vessels that feed a tumor. The crucial first step: Eating cancer-fighting foods that cut off the supply lines and

Each kind of light has a unique wavelength, but human eyes can only perceive a tiny slice of the full spectrum -- the very narrow range from red to violet. Microwaves, radio waves, x-rays and more are hiding, invisible, just beyond our perception. Lucianne Walk

Dig into the science of how new volcanoes form, and what causes their unpredictable eruptions.

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In February of 1942, Mexican farmer Dionisio Pulido thought he heard thunder coming from his cornfield. However, the sound wasn’t coming from the sky. The source was a large, smoking crack emitting gas and ejecting rocks, and would come to be known as the volcano Paricutin. Where do new volcanoes like this come from, and what triggers their unpredictable eruption? Steven Anderson investigates.

Lesson by Steven Anderson, directed by Cabong Studios.

Animator's website: https://www.cabongstudios.com.br/
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Welcome to the world of Lucius Popidius Secundus, a 17-year old living in Rome in 73 AD. His life is a typical one of arranged marriages, coming-of-age festivals, and communal baths. Take a look at this exquisitely detailed lesson on life

Many people in the United States and Latin America have grown up celebrating the anniversary of Christopher Columbus’s voyage. But was he an intrepid explorer who brought two worlds together or a ruthless exploiter who brought colonialism and slavery? And did he even discover America at all? Alex G

What keeps you up at night? pondering deep questions? excitement about a big trip? stress about unfinished work? What if the very thing keeping you awake was stress about losing sleep? This seemingly unsolvable loop is at the heart of insomnia, the world’s most common sleep

Most people will take a pill, receive an injection, or otherwise take some kind of medicine during their lives. But most of us don’t know anything about how these substances actually work. How can various compounds impact the way we physically feel, think, and even behave? Sara

Explore how marijuana’s two main active compounds, THC and CBD, affect your brain and body, and what risk factors to watch out for.

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In 1970, marijuana was classified as a schedule 1 drug in the United States: the strictest designation possible, meaning it was completely illegal and had no recognized medical uses. Today, marijuana’s therapeutic benefits are widely acknowledged, but a growing recognition for its medical value doesn’t answer the question: is recreational marijuana use bad for your brain? Anees Bahji investigates.

Lesson by Anees Bahji, directed by Anton Bogaty.

Animator's website: https://www.antonbogaty.com
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Thank you so much to our patrons for your support! Without you this video would not be possible! Maria Lerchbaumer, Ever Granada, Marin Kovachev, Ravi S. Rāmphal, Penelope Misquitta, Tekin Gültekin, Jhuval, Hans Peng, Gaurav Mathur, Erik Biemans, Tony, Michelle, Katie and Josh Pedretti, Vaibhav Mirjolkar, Thomas Bahrman, Allan Hayes, Aidan Forero, Uday Kishore, Mikhail Shkirev, Devesh Kumar, Sunny Patel, Anuj Tomar, Lowell Fleming, David Petrovič, Hoai Nam Tran, Stina Boberg, Alexandrina Danifeld, Kack-Kyun Kim, Travis Wehrman, haventfiguredout, Caitlin de Falco, Ken, zjweele13, Anna-Pitschna Kunz, Edla Paniguel, Elena Crescia, Thomas Mungavan, Alejandro Cachoua, Jaron Blackburn, Yoga Trapeze Wanderlust, Sandy Nasser, Venkat Venkatakrishnan, Nicolle Fieldsend-Roxborough, John Saveland, Jason Garcia, Robson Martinho, Martin Lau, Senjo Limbu, Joe Huang, SungGyeong Bae, Christian Kurch and Begum Tutuncu.

Explore the head-scratching problem of dandruff, and find out why it happens, and how it can be treated.

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On top of our heads, there is a type of yeast that lives and dines on all of our scalps. Feasting constantly, it’s in paradise. And in about half of the human population, its activity causes dandruff. So, why do some people have more dandruff than others? And how can it be treated? Thomas L. Dawson explores this head-scratching problem.

Lesson by Thomas L. Dawson, directed by Artrake Studio.

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Animator's website: https://www.artrake.com/
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Thank you so much to our patrons for your support! Without you this video would not be possible! Noah Webb, Zoë Tulip, B, Erica Guerrero, Richard Manklow, Roberto Chena, Luke Pisano, Andrea Gordon, Aleksandar Donev, Brendan and Nicole's summer job, Ryan Weiler, Jesse Lira, Ezekiel Raui, Itay Levi, Cameron Chakraverty, Petr Vacek, Rhys Patterson, Dennis, Margaret King, Olivia Fu, Katrina Adams, Regina Post, Mary Collins, Kari Teffeau, clumsybunnie, Adam Leos, Jeremy Laurin, Cindy Lai, Liz, Hannah Nommé, Rajath Durgada Manjunath, Dan Nguyen, Chin Beng Tan, Alejandro Gomez, Tom Boman, Karen Warner, Isorn Sookwanish, Iryna Panasiuk, Diane Gallin, Aaron Torres, Janice ESL, Vasundhar, Dessislava Vassileva, Denka Wee, Daru Bhargav, Brett Kaufman, Amy, Michael Clement, Christopher Lye and Ghaith Tarawneh.

Many of us will experience some kind of trauma during our lifetime. Sometimes, we escape with no long-term effects. But for millions of people, those experiences linger, causing symptoms like flashbacks, nightmares, and negative thoughts that interfere with everyday life. Joelle Rabow Malet

When faced with a bump in the road, sometimes we forget we have a choice: overcome the obstacle or let it overcome you. Steven Claunch, who was born without fingers on his right hand and with one leg shorter than the other and has excelled in basketball nonetheless, explains why obstacles can

Dig into the science of how anabolic steroids and their recreational use can affect your body, organs and brain.

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Steroids. They’ve caused global scandals. They’re banned in most athletic competitions. Yet the same properties that help elite athletes and bodybuilders improve performance also make steroids valuable for treating many illnesses and injuries, such as AIDS and cancer. So if steroids are used as medicine, they must be safe to use recreationally, right? Anees Bahji explores the effects of steroids.

Lesson by Anees Bahji, directed by Cris Wiegandt.

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When we measure things, most people are only worried about how accurate, or how close to the actual value, they are. Looking at the process of measurement more carefully, you will see that there is another important consideration: precision. Matt Anticole explains what exactly precision is and how can

Take a closer look at the challenges of antibiotic resistance and what we can do to prevent losing this vital medicine. Antibiotics: behind the scenes, they enable much of modern medicine. We use them to cure infectious diseases, and to safely facilitate everything from surgery to chemotherapy to organ transpl

The discovery of the structure of DNA was one of the most important scientific achievements in human history. The now-famous double helix is almost synonymous with Watson and Crick, two of the scientists who won the Nobel prize for figuring it out. But there’s another name you may

Your brain responds to pain in different ways depending on what type of pain it is. You can experience different types of pain by using this lesson to learn more about your brain's response to pain.

Your body processes medicine differently depending on the ailment it is treating. For example, if you have a headache, your body might take ibuprofen to relieve the pain. If you have a sprained ankle, your body might put ibuprofen in a bandage to keep