A century is 100 years. 20,000,000/100 = 200,000
200,000 centuries
1.8 million years ago
dinosaurs roamed the earth about 65 million years ago.
270 million years ago
65 million years ago
there was animal life 4.8 million years ago
They lived from 2.0 million years ago to 1.2 million years ago.
Around fifty million years ago.
4.567 million years ago
About 65 million years ago.
450 million years ago
About 300 million years ago.
The Mesozoic Period (251 - 65 million years ago) lasted approximately 216 million years. It consisted of the Triassic Period (251 - 200 million years ago), the Jurassic Period (199-146 million years ago) and the Cretaceous Period (145 - 65 million years ago).