According to Neil Sampson, an international forestry consultant, forest ecosystems are always in a state of transformation, but climate change might speed up the process.

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The president of a forestry consulting firm talks about the market for carbon offsets – tradeable measures of a forest?s proven capacity to store carbon. Find out how it works.

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December 1, 2008. Have you noticed the two bright objects low in the west after sunset? They?re Venus and Jupiter, and you?ll find them in a beautiful arrangement with the waxing crescent moon in the evening sky.

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November 30, 2008. Here?s a gathering of sky objects you won?t want to miss tonight and tomorrow night shortly after sunset. You?ll find the bright planets Venus and Jupiter near the place the sun went down, with a waxing crescent moon nearby. They?re low in the sky – but beautiful both November 30 and December 1.

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NASA astronomer Peter Chen devised a novel recipe using moondust to make mirrors for a future lunar telescope.

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Biologist and author Paul Ehrlich talks about the single biggest step forward in all of human history.

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Bhavik Bakshi, professor of chemical and biomolecular engineering at Ohio State University, talks about the benefits of carbon nanofibers — as well as the hidden costs.

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Biologist Camille Parmesan speaks of her emotional reaction to witnessing the die-off of species due to global warming. “I don?t know of a single scientist that?s not having an emotional reaction to losing their study systems,” she says.

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Paul Ehrlich of Stanford explains his ideas on why we humans dominate Earth. He says that our genetic evolution gave us things like dextrous fingers and binocular vision, but what put us over the top was our cultural evolution.

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