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 Continents were on the move in the Cretaceous, busy remodeling the ... and set in motion dramatic changes to the flora and fauna. An extraterrestrial impact or a bout of volcanism ...