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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Caroline Casey: Looking Past Limits
Activist Caroline Casey tells the story of her extraordinary life, starting with a revelation (no spoilers). In a talk that challenges perceptions, Casey asks us all to move beyond the limits we may think we have.
'Hiroshima' by Sarah Kay
Wonderful spoken word poetry from a young master wordsmith.
James Hansen: Why I Must Speak Out About Climate Change
Top climate scientist James Hansen tells the story of his involvement in the science of and debate over global climate change. In doing so he outlines the overwhelming evidence that change is happening and why that makes him deeply worried about the future.
Thandie Newton: Embracing Otherness, Embracing Myself
Actor Thandie Newton tells the story of finding her "otherness" -- first, as a child growing up in two distinct cultures, and then as an actor playing with many different selves. A warm, wise talk, fresh from stage at TEDGlobal 2011.
Louie Schwartzberg: Nature. Beauty. Gratitude.
Louie Schwartzberg is an award-winning cinematographer, director, and producer whose notable career spans more than three decades providing breathtaking imagery for feature films, television shows, documentaries and commercials.