🔄FROM THE ARCHIVE Big differences between the physiques of males and females could indicate polygamous mating choices in early humans.
. Archaeologists working on this project think these two skulls both came from the same kind of early human,Physical differences between males and females might speak to the early humans’ mating habits, writes
study co-author Michael Rogers, an archaeologist with Southern Connecticut State University, in an email toThis finding might revive a conversation anthropologists have been having for years. “The [small skull] could reopen a debate about how much variability there is likely to be within a single species of human ancestor,” he says.
Two excavations, each at slightly different parts of the same study area, recently revealed a skull each. The smaller set of skull fragments dates back to about 1.5 million years ago, while the larger cranial pieces are a little younger, about 1.25 million years old. Side by side, it’s obvious how different the two skulls are in size, Rogers says.
However, hints of size differences between the sexes appear in other pre-human primates, says paper co-author Sileshi Semaw, an archaeologist with the Centro Nacional de Investigacion sober la Evolucion Humana. Recent findings of similarly small skulls also reinforce the team’s belief that the find fits a pattern of sexual differences in body size between male and femaleYet these conclusions about our ancient ancestors are based on only a few skulls.
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