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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Amy Webb: How I Hacked Online Dating
Amy Webb explains how she sought her true love online. This video is informative, funny, sad, and, may even end happily ever after.
Noel Bairey Merz: The Single Biggest Health Threat Women Face
urprising, but true: More women now die of heart disease than men, yet cardiovascular research has long focused on men. Pioneering doctor C. Noel Bairey Merz shares what we know and don't know about women's heart health -- including the remarkably different symptoms women present during a heart attack (and why they're often missed).
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.
Shawn Reeder Yosemite Range of Light
Yosemite National Park, the High Sierra, and the Eastern Sierra are some of the most beautiful places on earth.
A Pep Talk from Kid President to You
We all need a little encouragement every now and then. This video is a short pep talk to help you get up an go when your go seems gone.