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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Alexander Tsiaras: Conception to Birth - Visualized
Image-maker Alexander Tsiaras shares a powerful medical visualization, showing human development from conception to birth and beyond. (Some graphic images.)
Philip Zimbardo: The Demise of Guys?
Psychologist Philip Zimbardo asks, "Why are boys struggling?" He shares some stats (lower graduation rates, greater worries about intimacy and relationships) and suggests a few reasons -- and he asks for your help!
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.
Brene Brown: Listening to Shame
Shame is an unspoken epidemic, the secret behind many forms of broken behavior. Brene Brown, whose earlier talk on vulnerability became a viral hit, explores what can happen when people confront their shame head-on. Her own humor, humanity and vulnerability shine through every word.
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.