Scientists were confused as to why a whopping 70 percent of mammoth fossils were males and those of females were so rare. In 2017, the Swedish Museum of Natural History found that this was due to poor male mammoth living arrangements.
When male mammoths reached adulthood, they were kicked out of the female-led herds. The males then either lived as hermits or formed bachelor herds. As such, the exiled males would engage in riskier behavior that would lead to a better chance of fossil preservation, like getting trapped in a sinkhole or a bog.