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Our teeth evolved from fish 'body armor' over 460 million years, scientists discover
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33-inch-long 'woolly' mountain rat caught on camera for first time ever
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QuizCat quiz: Can you get a purr-fect score?
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Capuchins have started abducting newborn howler monkeys in bizarre, deadly fad
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Scaly-foot snail: The armor-plated hermaphrodite with a giant heart that lives near scalding deep-sea volcanoes and never eats
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Why do elephants have big ears?
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Living lunch box? Iceland orcas are unexpectedly swimming with baby pilot whales, but it's unclear why.
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Wandering salamander: The tree‑climbing amphibian with a blood‑powered grip
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Fungus is wiping out frogs. These tiny saunas could save them.
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'It's risky for male frogs out there': Female frog drags and attempts to eat screaming male
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'Lovely freak of nature': Mutant blue frog hops into wildlife sanctuary workshop
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'Kermit the Frog' creature that lived 270 million years ago looked like a 'stout salamander' with 'cartoonish' grin
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Why is a mushroom growing on a frog? Scientists don't know, but it sure looks weird
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Dinosaur-era frog found fossilized with belly full of eggs and was likely killed during mating
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Annual cane toad kill-a-thon is about to start in Australia. Here's how to eliminate the pests humanely.
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World's tiniest fanged frog with males that 'hug' their babies discovered
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Cannibalistic spiderlings won't hunt their siblings even if they're starving
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Multiple species of ticks in the US can transmit red meat allergy, CDC reports reveal
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Asian hermit spider: The arachnid that gets stronger after ejecting its own penis
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Watch enormous deep-sea spiders crawl around sub-Antarctic seafloor
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'Zombie' spiders infected by never-before-seen fungus discovered on grounds of destroyed Irish castle
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Scientists discover rare venom-spraying scorpion in Colombia
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'Big boy' spider becomes Australia's largest deadly funnel-web after surprise discovery
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Giant funnel-web spider with fangs so big it could bite through a human fingernail arrives at Australian zoo
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Hairy giant tarantula: The monster among mini tarantulas with 'feather duster' legs
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Hoatzin: The strange 'stinkbird' born with clawed wings that appears to be an evolutionary 'orphan'
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'Secrets of the Penguins' will take penguin observations 'to another level,' executive producer James Cameron
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Dracula parrot: The goth bird whose piercing screams echo through New Guinea forests
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Great potoo: The 'tree stump' bird with a haunting growl and can see with its eyes closed
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Why don't all birds fly?
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Chickens sprouted dino-like feathers when scientists messed with the Sonic Hedgehog gene
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Ancient duck-like creature discovered in Antarctica may be the oldest modern bird ever discovered
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Are birds reptiles?
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Cheating little penguins are big on divorce, and other breeding secrets revealed
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Thousands of strange, blobby creatures are washing up on California beaches
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Giant phantom jelly: The 33-foot-long ocean giant that has babies out of its mouth
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Watch 'spaghetti monster' with dozens of pink-tipped sausage legs swimming near Nazca Ridge
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Otherworldly video captures rare jellyfish with a hitchhiker in its bell
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Tiny, highly venomous jellyfish stings 2 people in the middle of the ocean — forcing them to be airlifted to hospital
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Newly discovered jellyfish is a 24-eyed weirdo related to the world's most venomous marine creature
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Alien-like giant phantom jellyfish spotted in frigid waters off Antarctica
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Thousands of cannonball jellyfish wash ashore after swarming North Carolina’s Outer Banks
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Thousands of jellyfish swarm near Israel, mesmerizing images reveal
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Animal kingdom's most powerful puncher generates a 'phononic shield' to protect itself
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New supergiant 'Darth Vader' sea bug discovered in South China Sea — and it's absolutely massive
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Do crabs feel pain?
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Large, ghostly white crab-like predator discovered at the bottom of the Atacama Trench
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1-in-100 million 'cotton candy' lobster caught off New Hampshire alive and well at aquarium
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'You can see its guts and things': Weird see-through crustacean with giant eyes discovered off the Bahamas
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Crabs keep evolving to go from the sea to the land — and back again
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More than 10 billion snow crabs starved to death off the coast of Alaska. But why?
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'Hauntingly beautiful' image of a golden horseshoe crab wins wildlife photography competition
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Half-a-billion-year-old 3-eyed sea creature dubbed 'Mosura' breathed through big gills on its butt
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T. rex may have evolved in North America after all, scientists say
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Pterosaur tracks reveal flying reptiles were comfortable on land, too
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Dinosaurs might still roam Earth if it weren't for the asteroid, study suggests
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Researchers react to T. rex 'leather' announcement
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What was the fastest dinosaur?
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'Hell ant' with scythe-like jaws may be oldest ant fossil ever discovered
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Giant mosasaur discovered in Mississippi
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T. rex fossil trade hurting scientific research, study claims
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Do sharks make noises? An accidental discovery might just answer that question
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The Mariana Trench is home to some weird deep sea fish, and they all have the same, unique mutations
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Scientists capture footage of bizarre deep-sea creature with parasite pig tails
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Octopus spotted riding on top of world's fastest shark
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Golden scaleless cave fish discovered in China shows evolution in action
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Massive male great white shark tagged and released off Florida coast in new video
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Sharks: Facts about some of the ocean's top predators
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Scientists examine bloody mating wounds to reveal details of sharks' secret sex lives
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'Mega momma' great white shark killed on drumline may reveal secrets about iconic predator
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Invasive Asian needle ants are surging in US Southeast — and their bite can trigger anaphylaxis
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Bone collector caterpillar: The very hungry caterpillar of your nightmares
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'A relationship that could horrify Darwin': Mindy Weisberger on the skin-crawling reality of insect zombification
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'The parasite was in the driver's seat': The zombie ants that die gruesome deaths fit for a horror movie
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How many species of insects are there on Earth?
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'An artist would be challenged to create such replicas': How looking closer reveals the beauty and lethal efficiency of insects
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Moroccan fly maggot uses fake face on its butt to infiltrate termite colony
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Why are flies attracted to humans?
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These insects keep evolving to look like sticks. Why?
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33-inch-long 'woolly' mountain rat caught on camera for first time ever
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Quiz
Cat quiz: Can you get a purr-fect score?
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Capuchins have started abducting newborn howler monkeys in bizarre, deadly fad
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Why do elephants have big ears?
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Scientists solve mystery of how orange cats got their coats — and why so many are male
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What's the difference between apes and monkeys?
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QuizBig cats quiz: Can you get the lion's share of these questions right?
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Do pandas eat anything besides bamboo?
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How related are dire wolves and gray wolves? The answer might surprise you.
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Living lunch box? Iceland orcas are unexpectedly swimming with baby pilot whales, but it's unclear why.
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'Incredible and rare' sight as endangered whale attacked by 60 orcas in brutal hunt
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Dolphins: Facts about the intelligent marine mammals that use tools to hunt
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Whales: Facts about the largest animals on Earth
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'I thought I was dead': Terrifying video of humpback whale gobbling up kayaker explained
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Orcas off Antarctica filmed teaching calves to hunt in incredible new footage
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Orcas: Facts about killer whales
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Grieving orca mom carries dead calf around on her head for a 2nd time
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These endangered whales can live up to 150 years — twice as long as previously thought
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Scaly-foot snail: The armor-plated hermaphrodite with a giant heart that lives near scalding deep-sea volcanoes and never eats
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Watch elusive New Zealand snail lay an egg through a 'genital pore' in its neck
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Cuttlefish appear to wave at each other in what researchers think could be a form of communication
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Elusive colossal squid finally caught on camera 100 years after discovery in world 1st footage — and it's tiny
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Octopuses: Facts about the 8-armed geniuses of the sea
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'She turns her siphon into a gun': Watch coconut octopus firing stones at fish in world-1st footage
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Octopuses burn more calories changing color than you use on a 25-minute run
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Glowing mystery sea slug that feeds like a Venus fly trap captured in deep sea footage for 1st time
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Watch extremely rare footage of a bigfin squid 'walking' on long, spindly arms deep in the South Pacific
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Reptiles evolved earlier than we thought, newly discovered claw-mark fossils suggest
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Two new crocodiles discovered in the Caribbean
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Zoo unveils babies of 100-year-old giant tortoise, 'Mommy'
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'An up-tempo version of Darwinian evolution': How a mega freeze in Florida may have caused Burmese pythons to evolve at a blindingly fast speed
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Why do snakes shed their skin?
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Giant tortoise becomes first-time mom at about 100 years old
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QuizSnake quiz: Let's ssseee what you know about these slithering reptiles
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Iguanas sailed one-fifth of the way around the world on rafts 34 million years ago
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Venomous snake with 3 fangs may be the 'most dangerous death adder in the world'
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