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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Ramona Pierson: An Unexpected Place of Healing
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Universal Kabbalah is a system of philosophical thought and study. What can it do for us? How? What has Kabbalah contributed to society?