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Chilean Mummies Reveal Ancient Nicotine HabitPre-Hispanic cultures regularly consumed nicotine and hallucinogens.
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Animal Sex: How Ants Do ItFemales use one shot of sperm to fertilize their eggs for the rest of their lives.
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What Are the World's Fastest Trains?There's a lot of competition in the over-300 mph category.
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Why Do People Drink Milk?Long after adulthood, many of us keep consuming the stuff. Why?
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Silicon or Silicone: What's the Difference?One is a naturally occurring element, while the other is completely man-made.
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Is Caffeine Addictive?It's possible the people at Starbucks are caffeine addicts.
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Animal Sex: How Crabs Do ItMost crabs prefer the missionary position while essentially "naked."
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The 9 most interesting transplantsWhat is the most interesting transplant ever successfully completed?
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Parasite Infection Hits US Infants HardToxoplasmosis infections can sometimes lead to brain damage.
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Babies Born Late Face Behavior Problems, ADHDPost-term babies have higher risk of developing behavioral and emotional problems.
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Post-Traumatic Stress Replicated in MiceResearchers may learn more about treating PTSD in people from mice that have induced to have the disorder.
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Why Do Some Blond Kids Go Dark?Towhead blonds are often brunettes before puberty. Why?
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Must Sharks Keep Swimming to Stay Alive?Sharks don't all "breathe" the same way.
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What Is Sand?Ordinary sand is one of the most diverse materials on Earth.
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Earliest Case of Child Abuse Discovered in Egyptian CemeteryThe toddler died some 2,000 years ago, but fractures suggest violent shaking and direct blows.
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Animal Sex: How Ostriches Do ItIt involves a peculiar male dance and multiple partners.
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Secret to Clingfish Suction Power FoundThe key lies in the tiny hairs around the edges of their adhesion discs.
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Why Chinese 'Tiger Moms' Are So ControllingTurns out, their self-worth is tied up with their children's success.
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How is Gold Checked for Purity?It's not easy to check gold to see how pure it is.
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How to Test a DiamondDo you know how to tell a real diamond?
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What Is the World's Biggest Diamond?The biggest diamond in the world wasn't discovered until 1987.
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Animal Sex: How Newts Do ItSome male newts, sans any penises, use powerful pheromones to drive females wild.
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Animal Sex: How Great White Sharks Do ItAre these fearsome predators gentle lovers?
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Animal Sex: How Black Widow Spiders Do ItLet's just say the risky business involves pedipalps covered in sperm juice.
