Marie Antoinette became a symbol for the evils of excess— but was she a wasteful queen or a convenient scapegoat? You decide. — She was the Queen of France, notorious for living... Read more »
View full lesson: http://ed.ted.com/lessons/why-wildfires-are-necessary-jim-schulz Our early ancestors relied on lightning to cause forest fires, from which they could collect coals and burning sticks to help them cook food and clear land. Yet,... Read more »
Get informed on the science behind post-traumatic stress disorder, PTSD, its symptoms and how the brain reacts to trauma. — Many of us will experience some kind of trauma during our lifetime.... Read more »
Download a free audiobook version of “Into Thin Air“ and support TED-Ed’s nonprofit mission: https://www.audible.com/ted-ed — It’s a bustling day in Pompeii. After a quick visit to the market, Fabia spots her... Read more »
View full lesson: http://ed.ted.com/lessons/what-is-entropy-jeff-phillips There’s a concept that’s crucial to chemistry and physics. It helps explain why physical processes go one way and not the other: why ice melts, why cream spreads... Read more »
Discover what causes acid rain, and how scientists were able to largely eliminate this major environmental threat. — In 1963, scientists studying Hubbard Brook Experimental Forest made a shocking discovery. Their most... Read more »
Dive into the science of ocean currents (including the Global Conveyor Belt current), and find out how climate change affects them. — In 1992, a cargo ship carrying bath toys got caught... Read more »
View full lesson: http://ed.ted.com/lessons/why-is-biodiversity-so-important-kim-preshoff Our planet’s diverse, thriving ecosystems may seem like permanent fixtures, but they’re actually vulnerable to collapse. Jungles can become deserts, and reefs can become lifeless rocks. What makes... Read more »
Explore what makes trees a vital part of cities, and how urban spaces throughout history have embraced the importance of trees. — By 2050, it’s estimated that over 65% of the world... Read more »
View full lesson: http://ed.ted.com/lessons/how-do-tornadoes-form-james-spann Tornadoes are the most violent storms on Earth, with wind velocities that can exceed 200 miles per hour. How do these terrifying cyclones form? Meteorologist James Spann sheds... Read more »