sciencehabit quotes a report from Science Magazine: A new, slightly morbid study based on the calorie counts of average humans suggests that man-eating was mostly ritualistic, not dietary, in nature among hominins including Homo erectus, H. antecessor, Neandertals, and early modern humans. On average, an adult male human contains 125,822 calories of fat and protein, enough to meet the 1-day dietary requirements of more than 60 people. The numbers represent a lower limit, as Neandertals and other extinct hominins likely had more muscle mass than modern humans. Still, when compared with other animals widely available to ancient man like mammoths (3,600,000 calories), wooly rhinoceroses (1,260,000 calories), and aurochs (979,200 calories), it hardly seems worthwhile to hunt hominins that are just as wily and dangerous as the hunters, the researchers conclude. Some instances of cannibalism from nine Paleolithic sites, which date from 936,000 to 14,700 years ago, might be chalked up to starvation or not wanting to waste a perfectly good body that died from natural causes.