While lifelong partnerships may seem rare, many animals form bonds that last for years or even a lifetime. From birds that reunite with the same partner season after season to mammals that raise ...

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Scientists have documented same-sex behavior in many animals. Learn what it means, how it varies, and why human labels can mislead.

Animals mating with the same sex is a common trait, having evolved so repeatedly in mammals that it is now thought to be helpful for social bonding and reducing conflict. Over 1,500 species of animal ...

Animals may not celebrate Valentine’s Day, but courtship rituals, pair bonding and fierce competition shape love in the wild.

If the animal kingdom is anything to go by, love is, indeed, a many-splendored thing. We humans may have slightly over-complicated the process, with our penchant for ever-changing hairstyles and a ...