Male bighorn sheep are susceptible to local environmental factors in ways that females are not

A new study that looks at lifespan in wild mammals shows that females live substantially longer than males.

The research finds that, on average, females live 18.6% longer than males from the same species.

This is much larger than the well-studied difference between men and women, which is around 8%.

The scientists say the differences in these other mammals are due to a combination of sex-specific traits and local environmental factors.

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