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Phil Plait: How to Defend Earth From Asteroids

What's six miles wide and can end civilization in an instant? An asteroid - and there are lots of them out there. With humor and great visuals, Phil Plait enthralls the TEDxBoulder audience with all the ways asteroids can kill, and what we must do to avoid them.


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Lyndelle Palmer Clarke Wanted a Deeper Meaning to Her Life

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Mary Roach: 10 Things You Didn't Know About Orgasm

Mary Roach: 10 Things You Didn't Know About Orgasm

Author Mary Roach delves into obscure scientific research, some of it centuries old, to make 10 surprising claims about sexual climax, ranging from the bizarre to the hilarious.

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Brene Brown: The Power of Vulnerability

Brene Brown: The Power of Vulnerability

Brene Brown studies human connection -- our ability to empathize, belong, love. In a poignant, funny talk at TEDxHouston, she shares a deep insight from her research, one that sent her on a personal quest to know herself as well as to understand humanity. A talk to share.

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Amy Cuddy: Your Body Language Shapes Who You Are

Amy Cuddy: Your Body Language Shapes Who You Are

Body language affects how others see us, but it may also change how we see ourselves. Social psychologist Amy Cuddy shows how power posing can affect testosterone and cortisol levels in the brain, and might even have an impact on our chances for success.

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