UN climate report offers stark warnings, hope (Update)
Climate change is happening, it's almost entirely man's fault and limiting its impacts may require reducing greenhouse gas emissions to zero this century, the U.N.'s panel on climate science said Sunday.
New research explores scent communication in polar bears
New research indicates that scent associated with polar bear paws conveys information that may affect the animals' social and reproductive behavior. This chemical form of communication was likely shaped by ...