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00:40:00
Cheer on the competitors in this zany science cook-off, where teachers compete before a live webcast audience for the sought-after title, "Iron Science Teacher."

00:03:53
Join Exploratorium educator Ken Finn as he unlocks the mystery behind the black sand (a.k.a. magnetite) at Ocean Beach. This piece explores the origin of magnetite in the Sierra Nevada mountains, its journey down the Sacramento and San Joaquin rivers to the Bay, and the interesting physical properties of this mineral, plus some fun things you can do with it.

00:07:05
Framing of the Exploratorium's Observatory Building, the only completely new construction at at the piers, began in April 2011. Iron workers placed various sizes of steel beams in piles around the concrete base of the Observatory. Then, while a crane raised and held each beam aloft, the workers used metal spikes to line up the holes of the beams and inserted bolts, tightening them down to tie the structure together. Because the Observatory Building is less than two stories tall, the iron workers were allowed to shimmy across the beams without harnesses. Once this process was finished, the beams were plumbed and welded together.

00:46:01
Cheer on the competitors in this zany science cook-off, where teachers compete before a live webcast audience for the sought-after title, "Iron Science Teacher."

00:48:20
Cheer on the competitors in this zany science cook-off, where teachers compete before a live webcast audience for the sought-after title, "Iron Science Teacher."

00:47:47
Cheer on the competitors in this zany science cook-off, where teachers compete before a live webcast audience for the sought-after title, "Iron Science Teacher." This week's secret ingredient? Colors!

00:03:21
This After Dark event, which explored the science behind slowing down, included artist Joe Mangrum, who created a sand mandala on the floor of the museum. In this timelapse video, shot over 8 hours, you can see the full arc of the work.

00:01:28
Burning Man is a literal hotbed of explosions and fire. Join Exploratorium Senior Scientist Paul Doherty as he looks at the properties that make up fire through the lens of the Burning Man event.

00:00:59
Exploratorium Senior Scientist Paul Doherty explains a double rainbow sighting at Burning Man 2010!

00:02:43
This After Dark event explored the diverse nomadic communities that thrive in the Bay Area including a mobile diner, food carts, an annual arts event in the desert, urban foragers, and Bay creatures that arrived by ballast water.