Spinosaurus

Spinosaurus may have been the largest meat-eater to walk the Earth. At a jaw-dropping 17m long and weighing up to 20 tonnes, it was even larger than the mighty Tyrannosaurus. Spinosaurus’ sail may have been for heat dissipation – it lived in a swampy environment near the equator during the warm Cretaceous period. The sail may have also been used to attract mates or seem bigger than it was.