The Sahara Is Millions of Years Older Than Thought

It was surprising, but I could drive my tanks on the sand dunes.

Interesting article. I wonder how accurate some of these models are. When they make statements like the earth’s tilt to the sun at that time, in addition to some other stuff, can’t account for what happened. How can they make that statement? How do they know what the earth’s tilt was 7 million years ago? They must be smarter than me.