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00:05:16
Ever notice a brick-lined circle embedded into a street intersection? Keep an eye out and you'll see them throughout San Francisco. As part of the San Francisco Fire Department's Auxiliary Water Supply System, these brick circles indicate a cistern full of water. Join SFFD's Chief Ken Lombardi and Firefighter Hashim Anderson as they discuss the history and function of these cisterns, and demonstrate the drafting procedures used to access the water.

00:49:00
Join us as Rosetta moves ever closer to Comet 67P/Churyumov-Gerasimenko’s nucleus to map potential sites for a November landing.

00:15:00
Join Exploratorium Senior Scientist Paul Doherty as he scours the globe for the world'sgreatest science demonstrations. In the 'Try This' series, Paul introduces us to science teachers who are famed for teaching some of the best science lessons. Watch the webcast, see the activities, and then try it yourself!

00:30:00
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."

00:50:00
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."

00:50:00
Cheer on the competitors in this zany science cook-off, where teachers compete before a live audience at the Exploratorium for the sought-after title, "Iron Science Teacher." This week's ingredients can be found in your breakfast!

00:50:00
Where do fireworks come from? Who invented them? What causes their beautiful colors, and how do the bursting shells create such different patterns? Join us for some real illumination, and learn the difference between a jerb and a lance.

00:12:46
What is Community Radio? The DJs and station managers at KPOO, KUSF in Exile, Mutiny Radio and Radio Valencia give us some insight into community radio in the Bay Area, how it works and the challenges they face. http://www.kpoo.com/ http://savekusf.org/ http://pcrcollective.org/ http://radiovalencia.fm/

00:30:00
The most difficult phase of the Rosetta mission is the final rendezvous with the fast-moving comet. Learn what steps the ESA scientists and engineers are taking to ensure a successful landing for November 2014.

00:02:39
Join the Exploratorium's very own Ken Finn as he demonstrates fun activities, mixing up science with items found around the house.