Earth - The face of the earth is changing
3 important questions on Earth - The face of the earth is changing
What is a trilobite?
Fossil remains of extinct crustacean that lived on the bottom of the seas.
When were there dinosaurs on earth?
In the Cretaceous, 100 million years ago.
When did the continents reach their current position?
In the Quaternary, 18 thousand years ago.
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