You are on a rocky cliff by the sea in Brazil, South America, around 112 million years ago.

It is the Cretaceous period, and the movement of the continents is not only breaking up the giant northern and southern landmasses, but it continues to push up sea levels. This has opened up new seaways and coastlines.

Where once there was solid land, now there are ragged cliffs, buzzing with a colourful abundance of pterosaurs. The flying reptiles have filled the skies for 100 million years, and many species are now huge; wingspans of 3 to 6 meters, and more are common. But there is one species that dwarfs them all.

A giant shadow soars past, scaring and scattering the others. It is a Tropeognathus, 8 meters from wingtip to wingtip, and with a body bigger than a man's, it is the undisputed king of the skies of its time.