The shape and function of a penis is unique among some animals. Not every creature has one — birds, for example, simply eject sperm from their cloaca. But among male mammals, penises are widespread ...

When falling in love, humans often pay attention to looks. Many non-human animals also choose a sexual partner based on appearance. Male birds may sport flashy feathers to attract females, lionesses ...

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Add Yahoo as a preferred source to see more of our stories on Google. Bats have long been the odd ones out among mammals. They are the only creatures in this branch of the animal kingdom capable of ...

Scientists have solved the mystery of one of the animal kingdom's most disproportionately large penises thanks to a Dutch retiree recording bat sex in a church attic. The serotine bat does not use its ...

Odor-producing glands and tissues in bats may play a prominent role in mating behavior. When falling in love, humans often pay attention to looks. Many non-human animals also choose a sexual partner ...