A fiery mass extinction wipes out a rival, allowing dinosaurs to multiply, grow larger, develop longer necks and fend off foes with body armor.

After a bitter freeze, the Cretaceous era ushers in high sea levels that find pterosaurs flying to islands to feast and dinosaurs hunting in the oceans.

Dinosaurs rule the entire planet, with T. rex as the most deadly. But as the continents split and drift, danger lurks far away in the depths of space.