Catching up on the latest news about the allegations, which he says are false, that Republican presidential candidate Herman Cain sexually harassed some women when he was heading the National Restaurant Association in the late 1990s:
But what began as a "mostly peaceful" general strike that "drew thousands Wednesday for rallies and marches ... turned chaotic early Thursday after protesters took over a vacant building and police moved in, firing tear gas and flashbang grenades."
Animal Kings: Ants, like these workers carrying eggs to a plant's leaf after rain flooded their nest, have a combined biomass estimated in the billions of tons.
Credit Janice Haney Carr / AP
Oh, The Bacteria: A colorized electron micrograph image from the Centers for Disease Control and Prevention shows a large grouping of Gram-negative Legionella pneumophila bacteria. There are quadrillions of bacteria in the world, far surpassing humanity's 7 billion.
The revelation this week that the Earth now holds 7 billion people, according to the U.N.'s population division, prompted a question: Who else is in the 7 Billion Club? To find out which other animals had reached that plateau, we asked wildlife experts — and they patiently explained why our innocent question was nearly impossible to answer.