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Animal Sex: How Koalas Do ItKoalas 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.
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Brown Bears Caught Performing Oral Sex -
Motherless Male Zebra Finches Prefer Same-Sex Mates -
Ant Sperm Bundle Up to Outrace the Competition -
The First Vertebrate Sexual Organs Evolved as an Extra Pair of LegsOpinion 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.
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Animal sex: How jellyfish do itJellyfish mating involves courtship dances, swamps of reproductive material and buds, or tiny clonal outgrowths.
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How Corkscrew Vaginas and Female Penises Evolved -
Animal Sex: How Sea Turtles Do It -
Animal Sex: How Elephants Do ItDespite some human-like characteristics, elephants' mating behaviors are very different from our own.
