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00:20:00
Emerging from inside of stars, carbon is the fourth most abundant element in the universe, and the basis for all life on Earth. Polyamorous, it loves to bond, exchanging four of its electrons with atoms of itself and other elements to create an endless variety of chemistry, from DNA chains to soccer-ball shaped fullerenes to atom-thick sheets of graphene. As diamond, carbon is hard and abrasive, as graphite, soft. When its bonds are broken, carbon readily moves from one partner to the next, cycling between oceans, atmosphere, flora, fauna, soil, rocks, and fossil deposits deep below ground.

00:03:16
Dr. John Barnes, Station Manager of NOAA's Mauna Loa Observatory, shares the history of Charles Keeling's pioneering carbon dioxide measurements, which have been taken continually at Mauna Loa since 1958.

00:03:50
You've probably heard about the Texas-sized island of plastic trash swirling in the center of the Pacific Ocean. But did you know we have our own pockets of floating trash right here in San Francisco Bay? Join us on a trash safari with Sealife Convervation—a research and education group studying the volume, distribution, and sources of trash in the San Francisco and Monterey Bays.

00:04:08
TI staff educator Eric Muller shows me how to carbonate my tongue. Blech!

00:10:47
We tour the NOAA Atmospheric Research Observatory at the South Pole where scientists are monitoring carbon dioxide levels, CFCs, solar radiation, and the ozone hole.

00:16:25
Join Exploratorium staff as they give the quick answers to the most frequently asked questions about global warming: What is a "tipping point"? What are carbon credits? What is carbon neutral? What can I do? What can my kid do?

00:09:55
More quick answers to the most frequently asked questions about global warming.

00:59:28
Watch as the best teachers on the planet battle it out for the title of Iron Science Teacher. In this zany competition teachers will have ten minutes to create a science activity. Tee off with this week’s “secret” ingredient-aluminum foil!

00:48:17
The Live @ cast and crew take a journey to our Nation's Capitol for a special politically-charged edition of Iron Science Teacher. The competitors must create a math or science activity that is politically correct and leaves no child behind.

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!