The five most popular stories on CNN.com in the past 24 hours, according to NewsPulse.

FDA pulls common pain med off the market: The pharmaceutical company that makes the prescription pain medications Darvon and Darvocet has agreed to withdraw the drugs from the U.S. market at the request of the U.S. Food and Drug Administration, the FDA said Friday.

Missing Ohio women, boy confirmed dead: A kidnapping suspect provided information that led to the discovery of the bodies of a missing Ohio woman, her 10-year-old son and a family friend, authorities said.

Inside the science of how dogs think: Ever wonder what your dog is thinking as it gazes at you while you are barking commands? Duke University's Canine Cognition Center in Durham, North Carolina, is one of the few labs in the country focused on how dogs think.

U.S. sending tanks to Afghanistan: The United States is beefing up its firepower in Afghanistan by employing heavily armored tanks in Afghanistan for the first time in the nine-year war, military spokesman says.

Jennifer Aniston's costar really likes her: Actor Malin Akerman has a message for males who lust after Jennifer Aniston.