A new study comparing 59 species of primates linked same-sex sexual behavior to scarce resources and more predators in socially complex species. The findings show diverse sexual behaviors are common — ...

The Queen gets to tell everyone what to do, and she chooses a few males to breed with, we believe,” says Kerns. “However, she can have one of the largest litters of any mammals, over 30 babies at a ...

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Scientists found a 307 million-year-old fossil, Tyrannoroter heberti, revealing one of the earliest known land vertebrates ...

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Rachel Feltman: For Scientific American’s Science Quickly, I’m Rachel Feltman. In the animal kingdom lifespans can stretch from mere hours to entire centuries, but that’s just the start. Some ...

Some creatures have evolved to spend almost their entire lives in the air, rarely touching the ground. From ocean-gliding ...