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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.

00:54:21
Cheer on the competitors in this zany science cook-off. This week's secret ingredient was nuts and bolts

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?

00:11:02
TI staff biologist Karen Kalumuck breaks down the news about the mysterious ailment afflicting our country’s bees. Why does it matter, and what can we do about it?

00:05:28
Sometimes kids don’t have much experience with nature. TI teacher coach Kim Marie Hansen recounts how she got her inner city students outside and observing the world by using nature journals.

00:03:53
Got a tough kid in your class? TI Staff Educator Modesto Tamez tells a story from his teaching career—explaining a powerful technique that has helped him win over the stubborn, negative students.

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!

00:05:36
A lucky veteran teacher tells how she got started teaching in a supportive school and with help from her predecessor. This episode is one of several “first-year” stories from people in a difficult profession.