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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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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.

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Tierney Thys Swims with the Giant Sunfish

Marine biologist Tierney Thys asks us to step into the water to visit the world of the Mola mola, or giant ocean sunfish. Basking, eating jellyfish and getting massages, this behemoth offers clues to life in the open sea.

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Brain Plasticity and Transcendental Meditation with Dr. Fred Travis

What happens to the brain when someone practices the Transcendental Meditation® technique? All experiences changes the brain and nothing changes the brain like transcending.

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Bryan Stevenson: We Need to Talk About an Injustice

In an engaging and personal talk -- with cameo appearances from his grandmother and Rosa Parks -- human rights lawyer Bryan Stevenson shares some hard truths about America's justice system, starting with a massive imbalance along racial lines: a third of the country's black male population has been incarcerated at some point in their lives.

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Amy Cuddy: Your Body Language Shapes Who You Are

Body language affects how others see us, but it may also change how we see ourselves. Social psychologist Amy Cuddy shows how power posing can affect testosterone and cortisol levels in the brain, and might even have an impact on our chances for success.

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