Watson, a computer designed over the course of four years, is an IBM machine designed to decipher English-language clues and then search more than half a million books for the answer. If successful scientists think it could have real-world benefits.
New findings published in the Journal of the American Medical Association yesterday report that a long accepted but invasive protocol for treating breast cancer may not be necessary in some 20 percent of patients.
Egypt's famous ancient treasures and sites were in danger as the country's police collapsed amidst massive protests calling for democracy. The tourists have begun trickling back and authorities are taking stock. The World's Ben Gilbert reports from Cairo.
Japan fears it may lose its edge in technology, as fewer and fewer young people pursue careers in science and engineering. Some Japanese educators are trying to reverse this trend by making science "cool" again. Ari Daniel Shapiro reports.
Denton Ebel, a geologist and meteorite expert with the American Museum of Natural History, and John Pike, the Director of GlobalSecurity.org, discuss the Navy's plan to shoot down a failed US spy satellite.