The more you know about the past, the better prepared you are for the future.
The ultimate arbiter of the evolutionary fate of a species is the environment.
The dinosaurs became extinct because they didn't have a space program.
The dinosaurs are gone, and we’re not going to bring them back.
Dinosaurs are the greatest mystery of the planet's history.
The past is a foreign country: they do things differently there.
Dinosaurs were the first and greatest empire of life on Earth.
The dinosaurs' long tenure had ended, and the mammals had taken over.
The history of life on Earth is written in extinction.