Early humans might have been scavengers

[Universe]

In recent years more and more anthropologist have started to suspect early humans were technically scavengers. Bone marrow is believed to have been one of main sources of food for early humans.
https://www.history.com/news/prehist...ers-vs-hunters
https://www.discovermagazine.com/pla...ng-bone-marrow

[Universe]

It is interesting to note that humans, uniquely among the primates so far considered, appear to have stomach pH values more akin to those of carrion feeders than to those of most carnivores and omnivores. In the absence of good data on the pH of other hominoids, it is difficult to predict when such an acidic environment evolved. Baboons (Papio spp) have been argued to exhibit the most human–like of feeding and foraging strategies in terms of eclectic omnivory, but their stomachs–while considered generally acidic (pH = 3.7)–do not exhibit the extremely low pH seen in modern humans (pH = 1.5) [38]. One explanation for such acidity may be that carrion feeding was more important in humans (and more generally hominin) evolution than currently considered to be the case

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4519257/