Walking with Monsters

Narrator:
The dawn of the Triassic era and the earth has only just begun to show signs of recovery. The deserts have stopped growing and huge forests of primitive conifer start to recolonize the land. In these new forests, plant-eaters recover first. One in particular, like most of the large reptiles, they may resemble dinosaurs but lystrosaurus are more closely linked to mammals and to us. Astonishingly their vast herds make up more than half of all life on earth. Never again will a single species do so well.