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00:47:21
On December 11, 2005, Opportunity, one of the twin rovers exploring Mars, celebrated its first Martian birthday. Opportunity had been on the red planet 687 Earth days, which is one Martian year. (A year is the time it takes a planet to make a complete loop around the sun). Join us for a look back over the those 687 days of discovery: what we learned, what we saw, and what questions remained unanswered.

12:47:56
The concept of space-time--perhaps Einstein's most fundamental contribution to our understanding of the universe--will be explored using special red lasers.

00:07:58
How does your eye work? You see the world because light gets into your eyes. Your eye uses that light to make an image of the world inside your eye—just as a camera uses light to make a photograph. At the Exploratorium, we dissect cow eyes to show people how an eye functions, and look at the parts that make up an eye. This video shows and explains a dissection with one of our staff Explainers.

00:28:55
After its long journey to Saturn's largest moon, Titan, the Huygens probe is released from the Cassini spacecraft. The Huygens probe completes its descent to Titan, capturing hundreds of images on its way. Join Senior Scientist Paul Doherty as he gives us background on this incredible mission and sets the stage for the first close-up images of this mysterious moon.

00:26:34
Paul Doherty and Eric Wegryn explore the latest photos of Titan, Saturn’s largest moon, taken from only 750 miles away by the Huygens probe.

00:18:43
Dr. Paul Doherty and Dr. Eric Weygren discuss the most intriguing moon in the Solar System, Titan. Titan is veiled in a mysterious, dense, foggy atmosphere.

00:48:17
The Live @ cast and crew take a journey to our Nation's Capitol for a special politically-charged edition of Iron Science Teacher. The competitors must create a math or science activity that is politically correct and leaves no child behind.

1:14:57
James Turrell studied optics and perceptual psychology in college, but gravitated towards art as his curiosity led him to investigate light itself. In this Webcast of a lecture, James Turrell discusses his experiences manipulating pure light and how it became his artistic medium. He reveals how this early work led him to discover Roden Crater in Arizona and to create his subsequent lifelong project of transforming the crater into an astronomical observatory.

00:09:54
Our team of middle school students from the Aim High program investigates new technologies that use our unique physical traits as tools for identification. Eye-D explores the possibilities of retinal scans.

00:30:43
Join us as NASA releases the first images from the Hubble Telescope's new camera, NICMOS (the Near Infrared Camera and Multi-Object Spectrometer). We'll discuss the significance and beauty of these pictures of our galaxy with the NICMOS' Lead Scientist, Keith Noll.