You used a time machine to travel far into the past. You go inside the vehicle and after a few minutes find yourself on a plain somewhere in the savannah. When you get out of the time machine, you see in front of you a person at the stage of development of a Homo sapiens. He is completely naked, his hair all over his body is tangled and dirty. The hot sun beats down on your skin as the dry savannah wind carries the scent of dust and wild grass. In the distance, you hear the faint roar of a lion.