3 min read Continents were on the move in the Cretaceous ... in the extinction event at the end of the period 65 million years ago. In fact, the land, seas, and skies would never be the same ...

Instead, the move happened in fits and starts, with continents creeping apart at that single-millimeter-per-year rate for 40 million years, and then suddenly speeding up to 20 times that speed ...

Although they came into their own only after the extinction of the dinosaurs some 65 million years ... breakup of the continents that began some 200 million years ago and sent different landmasses ...