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How Do Fossils Form?Even plants and animals like to leave a good impression.
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Animal Sex: How Hyenas Do ItThe complicated world of hyena sex involves social hierarchies, weird and potentially dangerous courtship rituals and female pseudopenises that make forced sex impossible.
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Animal Sex: How Butterflies Do ItWhen it comes to sex, are butterflies as nurturing and gentle as they appear to be, or is there a more aggressive side to their mating?
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Animal Sex: How Antechinuses Do ItAntechinus sex involves ambushes, intermittent copulation lasting 14 hours and ultimately suicide.
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Mystery of Greenland's 'Disappearing Lakes' Solved -
Animal Sex: How Platypuses Do It -
Animal Sex: How Sloths Do ItRather than mundane, lazy sex, sloths participate in quite the mating game. In fact, sloth sex involves high-pitched screams, promiscuity and eye-gouging battles.
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Cranky Parrots? Weird Island Animals Described in Long-Lost Report -
Venom-Squirting Scorpions Blind Enemies with Toxin -
Animal Sex: How Polar Bears Do ItPolar bear sex involves long-distance tracking, fierce battles and lengthy copulation.
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Animal Sex: How Barnacles Do It -
Animal Sex: How Octopuses Do ItOctopus mating involves shifting body colors, detachable "penises," long-distance mating and sexual cannibalism.
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1st Americans Used Spear-Throwers to Hunt Large AnimalsFractures on spear points show, for the first time, that the first North Americans really did use spear-throwers to hunt from safe distances.
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Animal Sex: How Anglerfish Do ItAnglerfish mating involves biting, tissue fusion and the complete lack of mate choice by females.
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Animal Sex: How Dung Beetles Do ItDung beetle sex involves short breeding periods, intense competition and, of course, poo.
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Animal Sex: How Flamingos Do ItFlaming sex involves make-up, elaborate group dances and seasonal monogamy.
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Animal Sex: How Snakes Do ItSnake sex involves mating balls, battles similar to arm-wrestling and, sometimes, asexual reproduction.
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Astronomical Find: Ancient Greek Wine Cup May Show ConstellationsLong thought to show a random assortment of animals, an ancient two-handled wine cup may actually show one of the earliest depictions of Greek constellations.
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Animal Sex: How Tree Frogs Do itNot unlike humans, male tree frogs call on females to begin the mating game, and females prefer long calls.
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Remarkable Limb Regeneration Began 300 Million Years Ago -
Zombie Fungus Enslaves Only Its Favorite Ant Brains -
Get a Death Grip! Why Snakes Don't Slip When Climbing Trees -
Animal Sex: How Porcupines Do It -
Sky's Eerie X-Ray Glow Comes from 'Hot Bubble'
