Afraid of snakes? Be glad you didn't live in the Paleocene. A report in today's Nature describes the largest snake ever, a 50-foot monster that slithered through the tropics about 60 million years ago.
Ribs and vertebrae from Titanoboa cerrejonensis, found in a Colombian coal mine, show that the nonvenomous, coldblooded serpent weighed about 1.37 tons.
Lead author Jason Head, a paleontologist at the University of Toronto, says it likely ate primitive crocodiles--whole.