Earth’s 5 catastrophic mass extinctions, explained
Our planet’s first known mass extinction happened about 440 million years ago. Species diversity on Earth had been increasing ...
TV Guide3 年
Planet of Dinosaurs - Full Cast & Crew
The planet looks much like Earth, only with no trace of civilization. Soon the crew discovers that there are dinosaurs on the planet, and blood-thirsty buggers at that. The crew hopes to be found ...