If you’ve ever joked that dating is killing you, science may have just backed you up. According to a massive new study, ...

Blocking reproduction through contraception or sterilization increases lifespan in both male and female mammals across more ...

In the animal kingdom, penises can be spiked, split, corkscrewed—even detachable. They're one of the most diverse structures ...

Lucinda Aulsebrook does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

People have a complicated relationship with other species. Sometimes we treat them as livestock and prey, sometimes we treat them as laboratory experiments, and sometimes we treat them as family ...

A new study reveals that red squirrels fed in city parks become pregnant 24 percent more often than forest females.

Michelle Spear does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...