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00:05:20
Exploratorium staff physicist Thomas Humphrey explains what temperature and color have to do with one another.

00:04:51
A detailed demonstration of how to do the Color Chromatography activity, which lets you see the colors hidden in black ink. Includes a discussion of materials needed.

00:01:12
An introduction to an activity that lets you discover the secret colors hidden in black ink. With a paper towel, a black marker, and a cup of water, create a rainbow of colors while exploring capillary action and chromatography.

00:01:33
Explore the science behind this activity, including capillary action (how the water moves up the paper) and chromatography, or how different elements of the ink are carried along at different rates, allowing you to see that black ink is actually made up of many different colors.

00:53:51
On May 11, 2009, the space shuttle Atlantis was launched from the Kennedy Space Center and docked with the Hubble Space Telescope 360 miles above the earth. During Servicing Mission 4 (SM4), astronauts installed new, cutting-edge scientific instruments and replaced gyroscopes, batteries, and other equipment. After a difficult but very successful upgrade of the telescope, the astronauts released Hubble on May 19. The Exploratorium Webcast team will bring you two live Webcasts (May 20 & May 23) about this arduous mission and the future of the telescope.

00:32:23
On May 11, 2009, the space shuttle Atlantis was launched from the Kennedy Space Center and docked with the Hubble Space Telescope 360 miles above the earth. During Servicing Mission 4 (SM4), astronauts installed new, cutting-edge scientific instruments and replaced gyroscopes, batteries, and other equipment. After a difficult but very successful upgrade of the telescope, the astronauts released Hubble on May 19. The Exploratorium Webcast team will bring you two live Webcasts (May 20 & May 23) about this arduous mission and the future of the telescope.

00:31:53
Join photographer David Arnold as he talks about photographing climate change.

00:15:33
UC Berkeley astrophysicist Bill Holzapfel takes us on a tour of the South Pole Telescope and explains how it is unlocking the secrets of the Universe.

00:38:04
We talk to photographer John Weller, who spent the austral summer 2008 scuba diving under the ice in Antarctica.

00:27:26
The Mars Phoenix Lander will have been collecting data and sending it back to earth for a month! Exploratorium Senior Scientist Paul Doherty will examine the data and tell us what new information we've gained about Mars. We'll also get an update on our old friends, the Mars rovers Spirit and Opportunity!