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01:23:00
In this gem from 1990, we get a brief peek into the flourishing mind of German-born composer/sculptor Trimpin, a MacArthur "genius" award winner and the subject of a recent feature documentary. He chronicles his unique adventures through sound and music making, takes audience questions, and stages modified versions of his musical installations in front of the live audience.

00:10:24
Exploratorium staff member Earl Stirling demonstrates the amazing "Pyrograph", an artwork refined over four years. Like a fiery version of the museum’s classic Drawing Board, Stirling’s "Pyrograph" swings a pendulum over a sandy cauldron, tracing out oscillating patterns in colorful fire. This mesmerizing piece evokes both the Foucault pendulum and Dante’s Inferno.

00:01:54
This After Dark event featured a special installation of the Cubatron by Bay Area artist and engineer Mark Lottor. A visually stunning favorite of music and art festival audiences, the Cubatron is a 3–D light sculpture made from 8–x–8-foot modular cubes, each containing 1,000 individually programmable RGB LEDs. Viewed from any direction—even underneath—the Cubatron’s thousands of programmed pixels paint exquisite arrays of color that cascade in spectacularly dynamic patterns.

00:04:23
Ken Murphy, creator of A History of the Sky— a time-lapse visualization that will span an entire year—talks about his project during the After Dark event, Resolution.

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.

00:00:25
An introduction to the Ice Balloons activity, in which learners explore globes of frozen water and learn how to ask and then answer 'investigable' questions.

00:07:39
A detailed demonstration of how to do the Ice Balloons activity, including a discussion of materials needed and strategies for getting learners to ask and then investigate questions about what they are seeing.

00:01:03
The science and pedagogy behind this activity, including a discussion of concepts such as density, temperature, thermal conductivity, center of mass, freezing point depression, heat capacity, and the characteristics of the states of water, water vapor, and ice. Also describes strategies for observing, asking questions, and then choosing a question to investigate further.