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How to fix traffic jams - Jonas Eliasson
It's an unfortunate reality in nearly every major city—road congestion, especially during rush hours. Jonas Eliasson reveals how subtly nudging just …
2 days ago
What's changing in Earth's core? - Shannon Odell
Explore the science of why Earth’s atmosphere is losing hydrogen, and find out what other leaks could affect life on our planet.
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A hydrogen atom is …
2 days, 1 hour ago
How to attack (and defend) a medieval castle - Connor C. Wilson
Dig into the history of medieval European castles, and explore how the design of these formidable fortresses evolved over time.
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Medieval European ca…
2 days, 2 hours ago
What is Zeno's Dichotomy Paradox? - Colm Kelleher
View full lesson: http://ed.ted.com/lessons/what-is-zeno-s-dichotomy-paradox-colm-kelleher
Can you ever travel from one place to another? Ancient Gree…
2 days, 2 hours ago
One of history's most harmful myths - Anneliese Mehnert
Examine the empty land theory, which was created by European colonizers in South Africa to support their claims to the region.
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From the 1650s throug…
2 days, 3 hours ago
Texting that saves lives - Nancy Lublin
When Nancy Lublin started texting teenagers to help with her social advocacy organization, what she found was shocking -- they started texting back a…
2 days, 4 hours ago
Every city needs vital honey bees - Noah Wilson-Rich
View full lesson: http://ed.ted.com/lessons/every-city-needs-healthy-honey-bees-noah-wilson-rich
Bees have been rapidly and mysteriously disappearing …
2 days, 4 hours ago
The rise and fall of Italy's hired warriors - Stephanie Honchell Smith
Dig into the history of the elite mercenaries known as condottieri, who were soldiers for hire for Italy's rich and powerful.
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During the 14th and 15…
2 days, 5 hours ago
Can you cheat death by solving this riddle? - Shravan S K
Practice more problem-solving at https://brilliant.org/TedEd
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You and your best friend Bill are the greatest bards in the kingdom— but maybe not the …
2 days, 8 hours ago
The 4 commandments of cities - Eduardo Paes
Eduardo Paes is the mayor of Rio de Janeiro, a sprawling, complicated, beautiful city of 6.5 million. He shares four big ideas about leading Rio -- a…
2 days, 12 hours ago