http://news.softpedia.com/news/Giant-Snake-Fossils-Unearthed-103808.shtml
It's official! The oldest snake fossils known to date belong to those of a new species, whose fossils have been discovered in Colombia. The animal named Titanoboa cerrejonensis (the titan boa) is a predecessor of today's boa constrictor, one of the largest snakes in the world. Its ancestor had a length of 42 feet, weighed up to a ton, and lived more than 60 million years ago, after the disappearance of the dinosaurs. The snake was apparently a force to reckon with, as discoverers say that it's main course was crocodile meat, and the only way to get it was to actually go out and eat a crocodile.
Besides shedding some light on the evolution of snakes to their modern adaptations, the new find also offers a priceless insight into how the rain forests handled the climate at the time, as it's a well known fact that all those years ago the planet was a lot warmer than it is today. Experts say that it's reassuring to learn that the forests are able to withstand increased temperatures. This discovery will most likely calm those who maintain that the current level of emissions will result in the drying up of the rain forest.


