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Every day in the US, more than 500 drivers over the age of 65 are injured in accidents and about 15 of them are killed. AARP family issues expert Amy Goyer and "CBS This Morning" contributor Lee Woodruff talk to Gayle King and Erica Hill about the difficult and emotional issue of when seniors should stop driving

(PhysOrg.com) -- The rule that nothing can travel faster than the speed of light, c, is one of the most fundamental laws of nature. But since this speed limit has only been experimentally demonstrated for information carried by large groups of photons, physicists have recently speculated as to whether single photons and the information carried by them may be able to exceed the speed of light. In a new study, physicists have performed the difficult task of producing single photons with controllable waveforms, and have shown that single photons also obey the speed limit c.

Some of the undersea cables off the coast of Japan shared by the world's telecomm companies have suffered significant damage from the 8.9 earthquake and subsequent aftershocks. So far, there has been little disruption to communications thanks to rerouting data through alternate pathways.