The animal legend sci fi

A young historian and scientist is trying to prove that in the very far past there actually were animals and insects and that even humans did not always think rationally.

Although it was a very short period in human history, he shows that there was a time when early science was developed along with crude technologies around a time called "The Millenia" in which in most areas around the world people spoke a language called "Englis" and remnants of their documents have been uncovered and deciphered. These include images of four and six legged creatures, winged creatures, and a whole set of "animals".

The professors are very sceptical about his methods and conclusions and finally convince him that he must be wrong.