Riley Black’s new book, When the Earth was Green, uses the latest research to envision the ancient worlds of our favorite prehistoric animals.

You might know the Cretaceous Period for big animals such as Tyrannosaurus rex and Triceratops, or for being the end of the age of dinosaurs. But what was the world like in the millions of years ...

3 min read The start of the Triassic period (and the Mesozoic era) was a desolate time in ... of the food chain was filled with microscopic plants called phytoplankton; two of the major groups ...

Flowering plants were spreading across the landscape ... be the same in the new era that dawned after the close of the Mesozoic era.