The Cretaceous is a lot farther back than 6 million years. https://en.wikipedia.org/wiki/Cretaceous–Paleogene_boundary https://en.wikipedia.org/wiki/Cretaceous

The Cretaceous is a lot farther back than 6 million years. https://en.wikipedia.org/wiki/Cretaceous–Paleogene_boundary https://en.wikipedia.org/wiki/Cretaceous–Paleogene_boundary If you can remember the Jurassic Park tagline (original movie), "an adventure 65 million years in the making", then you've got a good ballpark figure for this.