Harvard physicist Lisa Randall talks about her new book, Knocking On Heaven's Door, an examination of the latest findings in cosmology and the history of scientific thought, and discusses a report that suggests neutrinos can travel faster than the speed of light.

Can neuroscience and psychology explain cruelty? In his new book, The Science of Evil, Cambridge University professor Simon Baron-Cohen explains the empathy spectrum we all lie on and that an erosion of empathy can explain why some commit cruel acts.

China launched an experimental spacecraft from the Gobi desert this week. The unmanned Tiangong-1 (which means "Heavenly Palace-1") is expected to orbit Earth for two years. Journalist Miles O'Brien discusses planned docking missions for the craft and China's space program.

In the new movie "Contagion" virologist W. Ian Lipkin served as both a technical advisor for the film, and as the inspiration for one of its main characters (a virus hunter named "Ian"). Lipkin discusses his role in the film and his own work identifying real-life viruses.

Kevin Shea is a retired New York City firefighter with an unorthodox home. He lives in a 93,000 cubic-foot-geodesic dome, equipped with solar panels, a wind turbine, and a geothermal system. The home is on the grid, but outside the box.

David Attenborough has produced dozens of shows and books about how plants and animals live. But his latest, Flying Monsters 3D, takes a look at creatures that have been extinct for around 65 million years--pterosaurs, or flying reptiles--and examines why they may have evolved to fly.

Analysts say manufacturer First Solar needs federal support to keep its competitive edge and to drive down the cost to produce solar panels, a key factor to industry success. But the kind of federal loan guarantees given to failed energy company Solyndra are increasingly unpopular in Washington.

NASA's most accurate census yet of near-Earth asteroids suggests that astronomers already know the location of more than 90 percent of the largest asteroids that could cause mass extinctions. The survey also suggests there are far fewer midsize asteroids than expected, but scientists don't know where most of these are.