Fossilized bones from the hominids Australopithecus robustus and Homo erectus were chemically analyzed  The robustus bones contained a lower ratio of strontium to calcium than did the erectus bones  The lower the ratio of strontium to calcium in fossilized hominid bones, the more meat the hominid had in its diet  H
erectus is known to have eaten meat
The diet of A. robustus included at least some meat.