The Earth has a wobble. Apparently that wobble was enough to turn the Sahara Desert from a very green habitat for thriving animal herds, into the bleak desert of sand dunes that we have today.
“Sometime between 11,000 and 5,000 years ago, after the last ice age ended, the Sahara Desert transformed. Green vegetation grew atop the sandy dunes and increased rainfall turned arid caverns into lakes.”
“The Sahara’s green shift happened because Earth’s tilt changed. About 8,000 years ago, the tilt began moving from about 24.1 degrees to the current day 23.5 degrees, Space.com. That tilt variation made a big difference; right now, the Northern Hemisphere is closest to the sun during the winter months”
This is a great article that explains a phenomenon not talked about a lot in today’s discussion of climate change by fanatics.