While much of the country is in turmoil, the Kurdish areas in northern Iraq have remained peaceful. The upheaval could help advance the Kurds' long-standing quest for an independent state.
The strong jawline and pronounced teeth of of Neanderthals likely evolved before their large braincase, scientists say. The evidence? A treasure of bones recovered from a single cave in Spain.
Children and teenagers who are aerobically fit and and have good motor skills do better academically, researchers say. But muscle strength doesn't help. And those motor skills may matter most.
President Obama says the U.S. will send up to 300 military advisers to Iraq to help it cope with a Sunni extremist group, but Americans won't be taking up combat roles.
The percentage of Hispanics who aren't affiliated with a particular religion is ticking upward. This demographic tends to be more socially liberal, too, which may have political consequences.