Mr. Smarty Pants Knows

The South American frog Dendrobates azureus is so poisonous that just brushing against it is sufficient to kill an adult human.

UC Berkeley psychology professor Dacher Keltner has found that the British smile by pulling their lips back and upward and exposing their lower teeth, while Americans usually just part their lips and stretch the corners of their mouths. The difference is so distinct he can pick out Britons from Americans by looking at photos.

The estimated 7 million illegal immigrant workers in the U.S. provide our Social Security system with a subsidy of as much as $7 billion each year.

The building that houses the State Museum of Azerbaijani Carpets and Decorative Applied Arts was originally a mosque built in the 15th century. Before it became a carpet museum, it was a museum dedicated to Lenin.