Add Yahoo as a preferred source to see more of our stories on Google. Arjan Mann with a 3D-printed replica of Tyrannoroter’s skull in the Carboniferous coal forest display at Chicago’s Field Museum.

Life began in the sea, and it took a long time to move onto land. Plants started creeping ashore about 475 million years ago. Roughly 100 million years later, the first backboned animals followed. For ...