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00:00:24
An introduction to a crowd-pleasing noisemaker called a sound sandwich, which you can adjust to raise or lower its pitch.

00:02:32
A detailed demonstration of how to make this primitive wind instrument using little more than a straw, two craft sticks, and some rubber bands.

00:01:48
The science behind this instrument, including a discussion of how vibration produces sound, and how long, massive objects vibrate slowly and produce a low-pitched sound, while shorter, less massive objects vibrate quickly and produce a high-pitched sound.

00:00:15
Aeolian Landscape is an exhibit in which a miniature wind-swept desert landscape is recreated by an electric fan and finely ground sand that mimics the process of wind picking up and depositing small particles. Visitors can change the direction of the fan, influencing the shape of the dunes.

00:58:32
Watch ancient text revealed and read for the first time in a thousand years! Archimedes was one of the world's greatest scientific and mathematical minds. His thoughts were inscribed on goatskin parchment, but the letters and diagrams were scraped off and written over by Greek monks in the Middle Ages. Now, using an intense x-ray beam generated at Stanford University's linear accelerator, some of the original Greek text will be revealed for the first time in the modern world.

00:00:11
An clip of the Aeolian Landscape exhibit by artist Ned Kahn. Blowing air sculpts sand into an ever-changing landscape.

00:00:40
This wobbly luminescent sculpture by Liz Hickok is both art work and a simulation of how a San Francisco neighborhood might jiggle when the Big One strikes.

00:03:25
In this short film Frank Oppenheimer gives us some of his visions for what he is creating in the beautiful Palace of Fine Arts. This film dates back to 1969, the year that the Exploratorium was founded.

00:55:27
Watch as Exploratorium staff and local teachers compete for the title of Iron Science Teacher. Each contestant has 10 minutes to make a science lesson out of a secret ingredient. In this special Halloween edition, today's secret ingredient is: Plastic Bags!

1:14:57
James Turrell studied optics and perceptual psychology in college, but gravitated towards art as his curiosity led him to investigate light itself. In this Webcast of a lecture, James Turrell discusses his experiences manipulating pure light and how it became his artistic medium. He reveals how this early work led him to discover Roden Crater in Arizona and to create his subsequent lifelong project of transforming the crater into an astronomical observatory.