A study finds that more than 800 species of vertebrates are moving closer to extinction, a fate that befell the golden toad. U.S. Fish and Wildlife Service via Wikimedia Commons hide caption

itoggle caption U.S. Fish and Wildlife Service via Wikimedia Commons

A core sample from the seafloor of the Gulf of Mexico shows a 2-inch layer of oily material. Researchers are finding oil on the seafloor miles away from the blown-out BP well.  Though researchers have yet to chemically link the oil deposits to the BP well, "the sheer coverage here is leading us all to come to the conclusion that it has to be sedimented oil from the oil spill because it's all over the place," says one scientist. Courtesy of Samantha Joye hide caption

itoggle caption Courtesy of Samantha Joye

A Pleurosigma, a type of phytoplankton in the ocean. Phytoplankton generate more than half of the Earth's oxygen. Harry Taylor/Nikon Small World hide caption

itoggle caption Harry Taylor/Nikon Small World