Why do we kiss under mistletoe? – Carlos Reif
View full lesson: http://ed.ted.com/lessons/why-do-we-kiss-under-mistletoe-carlos-reif The sight of mistletoe may either send you sc...
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Why do we love? A philosophical inquiry – Skye C. Cleary
View full lesson: https://ed.ted.com/lessons/why-do-we-love-a-philosophical-inquiry-skye-c-cleary Ah, romantic love; beautiful and i...
Why do we pass gas? – Purna Kashyap
View full lesson: http://ed.ted.com/lessons/why-do-we-pass-gas-purna-kashyap Flatulence is a daily phenomenon. In fact, most human b...
Why do we see illusions? – Mark Changizi
View full lesson: http://ed.ted.com/lessons/why-do-we-see-illusions-mark-changizi Why can’t our extremely complex eyes render...
Why do whales sing? – Stephanie Sardelis
View full lesson: http://ed.ted.com/lessons/how-do-whales-sing-stephanie-sardelis Communicating underwater is challenging. Light and...
Why do women have periods?
View full lesson: http://ed.ted.com/lessons/why-do-women-have-periods A handful of species on Earth share a seemingly mysterious tra...
Why do your knuckles pop? – Eleanor Nelsen
View full lesson: http://ed.ted.com/lessons/why-do-your-knuckles-pop-eleanor-nelsen Some people love the feeling of cracking their k...
Why does ice float in water? – George Zaidan and Charles Morton
View full lesson: http://ed.ted.com/lessons/why-does-ice-float-in-water-george-zaidan-and-charles-morton Water is a special substanc...
Why doesn’t anything stick to Teflon? – Ashwini Bharathula
View full lesson: http://ed.ted.com/lessons/why-doesn-t-anything-stick-to-teflon-ashwini-bharathula Teflon was in the spacesuits the...
Why doesn’t the Leaning Tower of Pisa fall over? – Alex Gendler
Dig into the 800 year history and architecture of the Leaning Tower of Pisa and find out what gives the tower its infamous tilt. ...