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Mike Brennan
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Why do we see illusions?

In this video, neuroscientist Mark Changizi explains why optical illusions occur

John Holdren speaks with NASA administrator Charles Bolden. Image courtesy of http://science.house.gov/

NASA on asteroid defense: If it’s coming in three weeks, pray

The U.S. House Science, Space, and Technology Committee met in a hearing on March 19, 2013 to discuss threats from space.

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Robot hand ties shoelaces and deals cards

In this video, Nigel Ackland demonstrates how his new robotic hand allows him to do ordinary things with extraordinary technology.

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The most astounding fact about the universe, according to Neil DeGrasse Tyson

In this three-minute video, Neil DeGrasse Tyson answers the question “What’s the most astounding fact you can share with us about the universe?”

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The wisdom of astronauts

This amazing video features footage of Earth from space and astronauts speaking on how their experience changed their lives.

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Video: What is the universe? (in 2 minutes)

The universe explained in two minutes.

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Video: Geminid Meteors on the Blue Ridge Parkway

Watch this time-lapse video capturing several days of Geminid meteor shower activity

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Video: Largest glacier calving ever caught on film

Watch this astounding video of an historic breakup of the Ilulissat Glacier in Greenland in 2008.

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Video: Marriage proposal by aurora light

Man proposes to his sweetheart as the aurora borealis – or northern lights – glow around them.

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Video: A bird ballet

Watch this beautiful video of thousands of birds swooping and diving in unison – dancing in the sky.