Something extraordinary happened to the human brain 100,000 years ago. In just a few thousand generations, our brains nearly doubled in size - a change that should have taken millions of years.

Scientists couldn't explain it until Terence McKenna proposed a radical theory. He believed early humans transformed into conscious beings not through fire or tools, but through eating a forbidden fungus growing in animal dung across Africa.

https://www.youtube.com/watch?v=LeF3n-1sPJY