Researchers in Colombia have found fossils of a snake that was more than 40 feet long and weighed over a ton. The paleontologists from the Florida Museum of Natural History say that the snake was a relative of the boa constrictor and slithered around 60 million years ago. From Science News:
At a site in northern Colombia, (paleontologist Jonathan) Bloch and his colleagues unearthed the partial remains of an ancient snake. Each of the dozen or so vertebrae in that body segment measured about 10 centimeters across. That's about twice the width of the largest vertebra taken from a 6-meter–long, modern-day anaconda, another modern relative, Bloch notes.
None of the ribs included in the fossil are complete, but the size and curvature of the fragments that remain indicate that the snake "would have had trouble fitting though the door into your office," he adds. The gargantuan fossils represent an as yet unnamed species.