This is an optimized version of “Lucy” (Australopithecus).
This skull has been optimized to print in around ½ the time without any loss of quality (the original scan of the skull has many voids which drastically slows down printing time.
There is also a 3mf file that has supports to allow for printing with minimal overhangs and support material.
Enjoy.
The author hasn't provided the model origin yet.