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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.

00:08:42
Exploratorium graphic artist David Barker describes the physics of baseball bats, and makes some sweet music in the process!

00:05:23
Our host, Stephanie Chasteen, shares some more fun facts and activities having to do with the science of sound.

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.

00:08:30
TI staff educator Lori Lambertson explains her philosophy of integrating math and science in the classroom, and how she puts it into practice.

00:22:45
Join Exploratorium Senior Scientist Paul Doherty and visiting scientist Alfredo Mateus for an exploration of hands-on demos. In today's webcast, Paul and Alfredo will be looking at a voice activated chemical reaction and what happens when you heat plastic in water!

00:11:07
NPR, or Neighborhood Public Radio is an artists collective and community radio project founded in 2004 by multimedia artists and educators Lee Montgomery, Jon Brumit and Michael Trigilio. Acting as a traveling band of guerilla broadcasters, NPR personnel have hosted thematic broadcasts from San Francisco to Serbia, including a stint at the 2008 Whitney Biennial. What is Neighborhood Public Radio? Imagine a storefront community radio station open to you. You get access to the airwaves regardless of your qualifications or message. We caught up with the founders of the now-decentralized NPR team, in Oakland, Chicago and San Diego to talk about the technical, social and political aspects of broadcasting, and about their tattoos. As a special treat for our listeners we thought it would be fun to ask Lee, Jon and Michael to create a new Audio-Art piece for our Podcast series. The idea was simple. They would each create a composition that was no more than 5 minutes long, and we would layer all three parts together to create a single new work. Visit the link at the bottom to hear the results.

00:01:59
Snow Mirror is the first in a series of pieces that celebrate slowness and black and white, in this piece the image of the viewer is created by the congregation and accumulation of white snow flakes in areas of the image that are brighter. The result is projected on a transparent silk fabric which creates a feeling of the flakes being suspended in space. Artist Daniel Rozin will be featured in the Exploratorium's 2009 exhibition, Reflections.