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00:04:10
San Francisco has more restaurants per capita than any other U.S. city, producing tasty meals—and thousands of gallons of used cooking oil. See how the SFGreasecycle program is turning this grease glut into fuel for the city's bus fleet.

00:11:47
Well, we tried our live webcast experiment and had some technical difficulties-there are always potential hazards when you make live programs. Nevertheless, here is the show, and we hope you enjoy it! Since there is rarely fog in the winter in San Francisco, Exploratorium Senior Science Educator, Scientist Eric Muller will create fog using Liquid Nitrogen just outside the Museum.

00:03:50
At the southern end of the Golden Gate Bridge, a construction project to rebuild the elevated freeway ramp formerly known as Doyle Drive is underway. Senior bridge engineer John Walters tours us through some of the new seismic technologies being installed, including a seismic joint designed to handle several feet of longitudinal movement and a spherical bearing that allows for three-dimensional movement. Walters also points out a temporary structure built over the historic Presidio Pet Cemetery to protect the grave sites while providing a platform for the construction overhead.

00:04:35
Have you ever wondered where your plastic bottle goes after you toss it in the recycling bin? Take a little trip with us to the San Leandro Waste Management facility, where Rebecca Jewell tours us through the complex world of residential recycling.

00:04:39
In an unlikely corner of industrial southeastern San Francisco, a herd of 60 goats gambol on a 10-acre site ringed by a rail yard and a cement recycling plant. Meet the movers and munchers behind City Grazing, a local “rent-a-goat” service that provides an ecological alternative to lawn mowers and herbicides. To learn more visit: http://citygrazing.com/

00:03:33
We all have an inner voice that pipes up now and then: "Don't eat that cake," it says, or "Where are my keys?" Does this type of self-talk serve any purpose? Recent research suggests that it does, helping us to build motivation and control impulses. Here, one man confronts the power—and the limitations—of his inner voice.

00:04:58
Throughout history, tattoos have represented conquests, coming of age, religion, spirituality, art, and even punishment. Today, tattoos are alive and thriving as a form of personal expression. How have modern techniques changed this art form? What are best practices in tattoo creation and care? Why are tattoos permanent—and when are they not? Join us as we "talk tat" with artitsts Suzanne "Fishy" Shifflett and Tanya Wischerath of Modern Electric Tattoo in San Francisco.

00:05:30
Monday is spiky. The number nine is orange. The letter F smells like smoke. Roughly one percent of people experience such blending of the senses, known as synesthesia. In this episode we meet Bryan Alvarez, a doctoral candidate at the University of California at Berkeley, who is researching the neural mechanisms of synesthesia in an effort to explain why only some of us experience this cognitive crosstalk.

00:06:00
Ever wondered where that crust on your car battery comes from? Exploratorium staff member Chuck Mignacco explains galvanic corrosion and the basics of battery maintenance using a time-honored miracle solvent: Coke. Watch for a surprise guest at the end of the video.

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.