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But imagine a time when the Earth looked a little … purple.
5:42
Creatures as tall as a five-story buildings shook the Earth.
5:20
Fossil fuels are made from the remains of extinct organisms.
5:28
Insects and other arthropods weren’t always so small.
3:54
A 270-million-year-old sea creature called Helicoprion that once swam the seas.
7:36
Natural history is full of living things that were long thought to have gone extinct only
5:21
Take a close look and you might see a little bit of yourself.
4:27
Today, we’re familiar with two types of flying vertebrates -- birds and bats.
4:45
What if we told you that there was a time when oxygen almost wiped out all life on Earth?
5:26
Smilodon was a fearsome Ice Age cat, the size of a modern-day tiger.
5:02
We know a lot about dinosaurs but there’s one question that has plagued paleontologists..
4:49
If you take it as a given that extinct dinosaurs were all weird and wonderful, then you go
