Animal Sex: News and Features

Koalas may be cute and cuddly, sleeping 18 to 22 hours a day, but they can become vicious when it's time to get down to business. Here's a look at how the marsupials mate.

We humans use the euphemism for sex that “we like to get a leg over” but the first jawed vertebrates – the placoderms – they liked to get a leg in.

Jellyfish mating involves courtship dances, swamps of reproductive material and buds, or tiny clonal outgrowths.

Despite some human-like characteristics, elephants' mating behaviors are very different from our own.