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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The Remarkable Story of Ernestine Shepherd
Do healthy, ripped bodies only belong to the young? Not if you're Ernestine Shepherd. At 77, she's the world's oldest female bodybuilder and in our original documentary short, we follow a day in her life.