The Cretaceous shared the warmth and dampness found in the Jurassic. As old dinosaurs and reptiles faced extinction, new dinosaurs and reptiles evolved. Sauropods became less common and the Earth looked much like it did today. After the Cretaceous, all of the dinosaurs became extinct.
Reasons for extinction include:
- A giant meteorite
- Too much heat relased into the atmosphere
- Not enough babies were produced
Some areas had damp and arid seasons and others had winter and summer. The forests had conifers and cycads as well as oaks and beeches.
Flowers first appeared in the Cretaceous to help with pollination. They ruled the land and encouraged insects to evolve.
Some of the dinosaurs that lived during the Cretaceous are:
- Velociraptor, who hunted in teams and might have had feathers.
- Mosasaurus, who had jaws resembling those of a crocodile and limbs resembling paddles.
- Spinosaurus, who had long arms and a sail back.
- Quetzalcoatlus, who had a 46 foot or 14 meter wingspan which made it the largest flying creature who ever lived.
- Ankylosaurus, who had fat, bony spikes and a weighty tail resembling a club.
