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1:17:34
How do opera singers sing loud enough to be heard over an orchestra? Can an opera singer's voice really break a wine glass? What's the difference between a baritone and a soprano? Discover the answers to these questions—and more!—in this presentation for families. Join physicist and composer Dr. Brian Holmes and San Francisco Opera Center Director Sheri Greenawald to explore how the art and science of singing combine in opera.

00:33:02
Take a look inside a comet! Launched on Jan. 12, 2005, the Deep Impact spacecraft hurtled through space on a collision course with an enormous comet. Join senior scientist Paul Dougherty as he explores this exciting mission.

00:04:12
McMurdo Station is the American staging area for Antarctic research. At the edge of Ross Island, off the coast of the continent, a small town of workeres feeds, houses, prepared, supplies, fuels, transports, and protects those who conduct field research throughout Antarctica and the surrounding waters. The community numbers 1,000 in the summer and 200 in the winter. And the community has a garden, from which they obtain their only fresh produce. Many love to visit this polar paradise.

00:04:57
McMurdo Station is the American staging area for Antarctic research. At the edge of Ross Island, off the coast of the continent, a small town of workeres feeds, houses, prepared, supplies, fuels, transports, and protects those who conduct field research throughout Antarctica and the surrounding waters. The community numbers 1,000 in the summer and 200 in the winter. And the community has a garden. But they aren't allowed to use soil.

00:02:56
Sonoma Valley farmer Bob Cannard doesn't fight nature: he collaborates with it. The result is bountiful fields of healthy, beautiful plants, some of which end up in the kitchen at Alice Waters' Chez Panisse restaurant in Berkeley, California. Here Bob speaks eloquently about appreciating and respecting nature. As he says, "it's simple...it's all right there before you."

00:00:38
Mike Wiltberger, magnetospheric physicist at the National Center for Atmospheric Research, narrates this artist’s rendering of a coronal mass ejecting from the sun and then impacting the earth’s magnetic field. Animation produced by the National Aeronautics and Space Administration.

00:45:44
NASA's Mars Exploration Rovers, Spirit and Opportunity, have long outlived their life expectancy of three months. Join us as we sum up the rover data and explain how this information changes our view of Mars.

00:46:28
After a week of analyzing the data from the Huygens probe, do scientists think of Titan differently? What were the unexpected findings? Which hypotheses were wrong? Which were correct? Join us as we talk to mission scientists at NASA's Jet Propulsion Laboratory and get the latest on this enigmatic moon.

00:31:54
After yesterday's historic mission to the surface of Titan, what happens next? What do the new pictures of Saturn's largest moon tell us, and what does it mean for our understanding of earth?

00:28:55
After its long journey to Saturn's largest moon, Titan, the Huygens probe is released from the Cassini spacecraft. The Huygens probe completes its descent to Titan, capturing hundreds of images on its way. Join Senior Scientist Paul Doherty as he gives us background on this incredible mission and sets the stage for the first close-up images of this mysterious moon.