(They've called it the Titanoboa and it's estimated that it was 42ft (13m) long, weighed more than a tonne and it was so wide it would have reached up to a person's hips. To put it into perspective reticulated pythons - the world's longest snakes - can reach up to 32ft (10m) and green anacondas - the world's heaviest snakes - are lightweights at just 550lbs (250kg). I have heard of the film "Snakes on a plane", but they could make a new one called "The snake is a bus".)