Terence McKenna was an American philosopher and ethnobotanist,
famous for his vast knowledge. Maybe the one thing that made him
the most famous is his theory of the human evolution. According to
him, the human's early transformation from Homo erectus to Homo
sapiens happened mainly thanks to the addition of the mushroom
Psilocybe cubensis in his diet. The mushroom is thought to have had
a positive impact on the species' vision.