Sean Carroll: Distant Time and the Hint of a Multiverse
At TEDxCaltech, cosmologist Sean Carroll attacks -- in an entertaining and thought-provoking tour through the nature of time and the universe -- a deceptively simple question: Why does time exist at all? The potential answers point to a surprising view of the nature of the universe, and our place in it.
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Faith Jegede: What I've Learned From My Autistic Brothers
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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.
Jok Church: A Circle of Caring
In this 3-minute talk, cartoonist and educator Jok Church tells a moving story of the teacher who cared for him when no one else did -- and how he returned the favor.
Lucianne Walkowicz: Look Up For a Change
Lucianne Walkowicz explains the importance of preserving our dark night sky from the perils of light pollution and other lesser-known factors.