Earliest Evidence of Human Ancestors Butchering and Cannibalizing Each Other Discovered

Cut marks on a 1.45 million-year-old shin bone found in Kenya suggest human ancestors butchered and ate each other.
The cut marks were made with stone tools in a manner typically used to remove flesh from bone, indicating the bone was eaten.
Bite marks on the bone match those of big cats, showing predators also fed on the remains.
Researchers can't identify which human ancestor species the bone belonged to, but if it was butchered by its own kind, it may be the earliest evidence of cannibalism.
Cannibalism at the time may have been for dietary, ritual, or cultural reasons.