Around 58 million years ago a monstrous snake slithered out of the swampy jungles of South America and began a reign of terror.
Weighing more than a ton and measuring 14m (approximately 50 feet) the giant reptile could swallow a whole crocodile without showing a bulge. But a few years ago scientists never even knew it existed.
Thought to be a distant relative of the anaconda and boa constrictor, the snake – named “titanoboa” – was not venomous. Instead it crushed its prey with the constricting force of 400lbs per sq inch – the equivalent of lying under the weight of one and a half times the Brooklyn Bridge.