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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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Mysterious Earthen 'Mima' Mounds Created by Plants, Not Animals -
Motherless Male Zebra Finches Prefer Same-Sex Mates -
Found! Hidden Ocean Locked Up Deep in Earth's Mantle -
Why Can't People Remember Being a Baby? -
Plastic Legacy: Humankind's Trash Is Now a New Rock -
Can Men Lactate?Unlike female nipples, male nipples appear to be purely decorative. But can they also be functional and secrete milk — that is, can men lactate? Short answer: Yes, under certain circumstances.
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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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Earliest Evidence of Flower Pollination by Birds Unearthed -
Origins of inebriation revealed -
Are mermaids real?Opinion Are the legends about the half-human, half-fish creatures true?
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How the Mars Moon Phobos Got Its GroovesMaterial blasted off Mars from meteor impacts may have scarred the surface of Phobos, one of the Red Planet's two tiny moons, a new study suggests.
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Monster Solar Flare This Year Was the Best-Observed in History (Video, Photos)Four spacecraft and one ground-based observatory recorded the eruption of a powerful X-class solar flare on March 29, making it the best-observed such event in history, NASA officials said.
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Animal Sex: How Sea Turtles Do It -
Why Do Dogs Wag Their Tails?It's commonly believed that dogs wag their tails to convey that they are happy and friendly, but this isn't exactly true.
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Why Do I Bruise Easily?A contusion, or bruise, is a reddish-purple discoloration of the skin that doesn't blanch, or turn white or pale, when pressed upon.
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'Mummy Lake' Used for Ancient Rituals, Not Water Storage -
How Do Enzymes Work?Enzymes are biological molecules (typically proteins) that significantly speed up the rate of virtually all of the chemical reactions that take place within cells.
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Animal Sex: How Elephants Do ItDespite some human-like characteristics, elephants' mating behaviors are very different from our own.
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Chilean Mummies Reveal Signs of Arsenic Poisoning -
How Do Dolphins Sleep?Dolphins sleep with one eye open, and with half their brain wide awake, researchers have found.
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Bee Fossils Provide Rare Glimpse into Ice Age EnvironmentFossilized bee pupae found in the La Brea Tar Pits in Los Angeles suggest the region experienced a very moist period during the Ice Age, a new study says.
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Massive Turquoise Trade Network of Ancient Pueblos RevealedUnsatisfied with mining turquoise from local deposits, ancestral Pueblo people in New Mexico used long-distance trade networks to obtain their precious mineral.
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Monks' Secret: Asbestos Lurking Beneath Byzantine Wall PaintingsAsbestos has had a long history of use, and research now shows it was first integrated into plaster coatings in the 12th century to provide a smooth layer for monastery wall paintings.
