Cannibal ancestors would kill and eat each other because it was "cheaper" than catching animals, claims a new study.
Researchers found archaeological evidence in Spain allegedly showing "indisputable signs of cannibalism" in an ancient human species called Homo antecessor and Neanderthals.
The analysis showed that cannibalism is a good survival method for the predecessors of Homo sapiens, as they had to spend much less time and energy on other people than faster animals. Animal meat is higher in calories.
The study published in the Journal of Human Evolution claims that human flesh was just as nutritious to primitive humans.
People were found at the archaeological site of Gran Dolina in Spain.
The evidence of human consumption includes tooth stains, cuts, and fractures designed to fully expose bone marrow.
Human remains were found among nine other mammal species, including deer and 22 individuals who had not been eaten.
The forerunner of Homo is one of the oldest species discovered and living in Europe there about a million years ago.
The lead author of the study, Jesús Rodríguez, said: "Our analysis shows that Homo's predecessor, like any predator, chose its prey on the principle of cost-benefit balance optimization. Only at this equilibrium were people a" senior " prey type.
"This means that much food can be obtained from humans at a low cost compared to other prey animals." that the cannibals could have eaten members of their own group if they died for other reasons.