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Study Says 40 Billion Planets In Our Galaxy Could Support Life

A new study in the Proceedings of the National Academy of Sciences finds that roughly 1 in 5 stars, like our own sun, have an Earth-like planet orbiting around it. That's about 40 billion planets that could support life in the Milky Way galaxy. Melissa Block talks to co-author Geoff Marcy, an astronomy professor at the University of California-Berkeley, about the latest numbers.

Why India's Mars Mission Is So Much Cheaper Than NASA's

India launched its first-ever probe to the red planet on Tuesday at a cost of one-tenth what NASA is expected to pay for its latest Mars mission.
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Environmental Outlook: Dan Fagin: "Toms River: A Story of Science and Salvation" (Rebroadcast)

For two generations, chemical companies in Toms River, N.J., dumped toxic waste. For this month’s Environmental Outlook, Diane and her guest discuss the life of a small town ravaged by industrial pollution.


Galaxy Quest: Just How Many Earth-Like Planets Are Out There?

About 22 percent of sun-like stars in our galaxy may have planets orbiting them that are about the size of Earth and bathed in similar amounts of sunlight, according to a new analysis of data from the Kepler Space Telescope.

Childhood Maltreatment Can Leave Scars In The Brain

Brain scans may help people who were ill treated as children realize that they process fear differently than others. They may have a harder time realizing what's truly a threat and what's not. Researchers say that can lead to increased risk of anxiety and depression.

How To Levitate A Sandwich: 'Modern Cuisine' Spills Photo Secrets

A ham and cheese sandwich floats in midair. A Weber grill is sliced in half to expose a burger sizzling inside. The Photography of Modern Cuisine is both a visual feast and a practical guide to food photography.

How'd They Do That? The Story Of A Giant Rock And A Road Of Ice

Huge stone slabs weighing up to 300 tons that now reside in Beijing's Forbidden City were slid more than 40 miles in 15th- and 16th-century China over water-lubricated ice roads in the dead of winter. Though spoked wheels had been around for almost 3,000 years, the ice roads were smoother and required less manpower.

Why Are Pig Farmers Still Using Growth-Promoting Drugs?

There's a curious twist in the contentious debate over feeding antibiotics to animals in order to make them grow faster. Evidence suggests using antibiotics for growth promotion, at least among pigs, doesn't even make economic sense. But some pork producers don't believe it.

China Sets Ambitious Agenda In 'Asian Space Race'

India launched its Mars mission on Tuesday. But China is still leading what some see as a space competition among Asian countries. It has worked on a lunar rover, a space station as well as its own unmanned mission to Mars.

Rapping Biology? Why Science And Hip-Hop Works

Engaging students in science class is no easy task but using hip-hop may be one way to get their attention. Research scientist Danielle Lee uses hip-hop to bridge the gap between culture and science.