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00:00:36
This is a time-lapse movie of a chain reaction activity presented at the Exploratorium booth during Maker Faire 2009. Participants were asked to build a portion of a collective chain reaction contraption, which was set off twice during the day. Photos were taken every 30 seconds and then joined in a 24 fps movie.

00:16:24
In conjunction with this summer's special exhibition Reflections, Exploratorium Senior Scientist Paul Doherty joins us for a hands-on Webcast. What effect does looking through two mirrors have on an image? Or three mirrors?

00:09:29
Newton’s laws were never so tasty. Exploratorium staff educator Don Rathjen demonstrates concepts about force using a file folder and a marshmallow.

00:13:23
The Exploratorium's Playful Invention and Exploration (PIE) department is inviting the public to create components of a multi-step chain reaction at Bay Area Maker Faire, 2009. Watch live as each maker's machine sets off the next, culminating in a grand finale!

00:16:50
For the second time, the Exploratorium's Playful Invention and Exploration (PIE) department is inviting the public to create components of a multi-step chain reaction at Bay Area Maker Faire, 2009. Watch live as each maker's machine sets off the next, culminating in a grand finale!

00:07:42
How big does a mirror have to be for you to see yourself in it? Exploratorium staff physicist Thomas Humphrey describes an activity you can use in your classroom to investigate simple optics.

00:04:00
TI staff educator Modesto Tamez explains how to make a simple straw oboe that will bring down the house (and teach good physics!)

00:05:56
TI staff educators Lori Lambertson and Tory Brady explore the math behind the morning paper.

00:17:30
We speak with glaciologists Slawek Tulaczyk and Jake Walter, who study ice-sheet dynamics.

00:39:52
Join us as we talk to scientists working with IceCube, a neutrino telescope buried in the ice under the South Pole.