For hundreds of millions of years the entire Earth was covered with tropical rainforest. There were no ice sheets anywhere on the planet. Then about 40 million years ago the Earth began to cool. First slowly, then extremely rapidly until…
Documenting the Human Experience
For hundreds of millions of years the entire Earth was covered with tropical rainforest. There were no ice sheets anywhere on the planet. Then about 40 million years ago the Earth began to cool. First slowly, then extremely rapidly until…