Rare half-male, half-female cardinal spotted in Pennsylvania
Flying squirrels secretly glow pink, thanks to fluorescence
Mutant blue-eyed coyotes spreading through California
Meet Romeo, 'world’s loneliest frog,' and his new mate Juliet
Sea cucumbers bloat themselves to zoom around the ocean
Duking it out over dung, beetle battle heads into overtime
Lion attacks pangolin in extremely rare video
Hares are cannibals and eat meat, surprising photos reveal
New snake species discovered in another snake’s belly
Watch: Dracula ant’s killer bite makes it the fastest on Earth
Once thought extinct, bizarre horned frog reappears in Ecuador
How humans are hijacking scent, the universal animal language
These spiders feed their leftovers to carnivorous plants
These animals have the biggest, weirdest cheek pouches
Listen: Mice ‘argue’ about infidelity in ultrasound
New species of giant salamander discovered in Florida
This goose feigns injury to save its chicks from a leopard
Not just mammals: Some spiders nurse their young with milk
These ants decorate their homes with the heads of their enemies
These birds are one of the rare animals that hide to mate
Why komodo dragons don’t stray far from home
Earwax reveals how humans have changed whales’ lives
Choose your weapon: How animals got their tusks, horns, and antlers
An ode to earwig wings, which break standard laws of origami
World's largest deep-sea octopus nursery discovered
Species with the spookiest names—and how they earned them
Mesmerizing, rare dumbo octopus filmed in the deep sea
Viral photo sparks unusual discussion of squirrel anatomy
These animals’ screams will chill your blood
Water-spitting fish can identify and remember human faces
Stunning new sea slug species look just like seaweed
Early mammals hid from dinosaurs in the dark, changing their DNA forever
These ultra-rare monkey twins have different fathers
These freaky fish use their fins to 'walk' across the seafloor
Disease-carrying mountain goats threaten ancient bighorn sheep herd
Small Weasel-Like Animals Are Taking Down Big Cats
These Moths Drink the Tears of Sleeping Birds
Rare Tree Kangaroo Reappears After Vanishing for 90 Years
These Glowing Fish Spread Parasites to Sperm Whales
Praying Mantises Hunt and Eat Fish, in a First
Meet the Woodpecker That Impersonates a Snake
Sex, Lies, and Grappling Hooks: How Parasitic Beetles Trick Bees
Watch: Sea Cucumbers Are The Ocean’s Vacuum Cleaners
New Tarantula Species Found at Record-Breaking Heights
Video: How One Mother Duck Can Raise 76 Ducklings
Should You Let a Shrimp Clean Your Teeth?
Solo Dolphin Filmed Hunting With ‘Net’ Made of Mud
This Secret Skill Helps Lizards Survive Hurricanes
How Do You Study Endangered Whales? Collect Their Snot
The Surprising Reason Tiny Lemurs 'Grow' Their Own Gardens
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