Once and for all, scientists have put to rest the theory that humanity’s ‘natural diet’ consists of soybeans and salads. The proof they’ve uncovered is — literally — set in stone.

Over the past few decades, the notion that humans are biologically suited to be vegetarians has gradually receded as an activist talking point. Proponents still insist that a plant-based diet is mankind’s “natural” diet, but there’s much greater traction these days in demonizing meat-eating as a nutritional and ecological disaster.