I Was Reborn and Became a Human Ancestor

"You're awake! What about industrialization and global warming?" "What is a cell phone?" "What self-driving car? Your head was smashed with a rock!" "Come on, eat some fruit." It's terrible! He traveled to the Oligocene Epoch, fifty million years ago. Human civilization no longer exists, and he has become the ancestor of mankind! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.