Why does thunder rumble? Acoustic professor Trevor Cox explains that it has to do with the way lightning is a jagged line. "Each little kink is actually generating the sound, and the reason thunder rumbles is because the sound takes different time to come from different kinks because they're all slightly different distances from you," he says.
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Most of us have never been submerged under more than a few feet underwater. But just a few meters down, the water compresses the tissues of your body so that you become more dense. At that point, "You're more likely to sink than float," says Dr. Kevin Fong.
"The term 'vegan leather' makes me think that you peeled a carrot and took the skin and made a jacket out of it," says Tim Gunn, pictured above at the Under the Gunn finale fashion show.
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In Saving Mr. Banks, Emma Thompson plays Mary Poppins author P.L. Travers, who, Thompson says, hated the whole idea of having her book made into a film.
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Kevin Spacey (left) and Robin Wright star in House of Cards, directed by David Fincher. The Netflix series, which follows a Machiavellian politician, is an adaptation of a BBC series of the same name. Hear an interview with Spacey and Fincher.
Joel (left) and Ethan Coen wrote and directed Fargo, The Big Lebowski, O Brother Where Art Thou?, No Country for Old Men, A Serious Man and True Grit. Their latest film is Inside Llewyn Davis.
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