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00:37:59
This week's secret ingredient was leaves! This week's secret ingredient was triangles! Cheer on the competitors in this zany science cook-off. Teachers compete before a live audience at the Exploratorium for the revered title, "Iron Science Teacher."

This week's secret ingredient was lightbulbs! Cheer on the competitors in this zany science cook-off. Teachers compete before a live audience at the Exploratorium for the revered title, "Iron Science Teacher."

00:37:00
Cheer on the competitors in this zany science cook-off. Teachers compete before a live audience at the Exploratorium for the revered title, "Iron Science Teacher." The Exploratorium's Iron Science Teacher competition showcases science teachers as they devise demonstrations around a particular "secret" ingredient—and today's secret ingredient was oil!

00:05:08
Annette Young Smith, along with her neighbors, transformed a littered patch of grass and weeds on a median strip in San Francisco's Bayview District into a lush neighborhood garden full of decorative and edible plants.

00:05:17
Watch the process of a deceased monitor lizard providing energy for other organisms to live in this time-lapse video. Look for this exhibit in the museum, upstairs in the Traits of Life area.

00:00:52
Slow motion footage of Pyrograph, a work by Earl "Dodger" Stirling that has been described as a cross between Dante's Inferno and the Foucault Pendulum. Like a fiery version of the Exploratorium's classic Drawing Board exhibit, Pyrograph swings a pendulum across a sandy, flaming cauldron and traces out oscillating patterns in colorful fire.

00:04:48
Sarah Santos and Jeremy Rector demonstrate two ways to make ferrofluid during a live Webcast of the Exploratorium's Iron Science Teacher. Watch the whole episode (type "oil" in the search box), along with many other episodes of Iron Science Teacher at www.exploratorium.edu/tv

00:32:49
Join us for a live Webcast exploring eggs! Eggs are cells – the largest cells. We all come from eggs. Come explore the wondrous workings of eggs with staff biologists including naked eggs, de-shelled to demonstrate osmosis, sea urchin egg fertilization, life inside an egg using chick embryos, and other ova-vations to discover their amazing properties.

00:20.15
We take a tour of Black Island, and speak with Tony Marchetti who for the last 13 years has been running this vital communications station for the U.S. Antarctic operations.

00:00:45
Solomon helps remote field camps with food. Today we found him making up one of the most important foods - gorp (often called "trail mix"). Check out the cool tool he uses to mix the tasty treat.