Transparent glassfrogs 'vanish' at night by hiding red blood cells in liver By Joshua A. Krisch published 22 December 22 Glassfrogs can render themselves nearly invisible while they sleep with a unique trick; they pack nearly 90% of their red blood into one of their organs.
Massive graveyard of fossilized shark teeth found deep in the Indian Ocean By Jennifer Nalewicki published 21 December 22 Australian researchers discovered 750 shark teeth deep in the Indian Ocean.
Female zebra shark opts for 'virgin birth' even when sharing a tank with healthy males By Joshua A. Krisch published 20 December 22 A female zebra shark conceived her pups through 'virgin birth,' despite sharing a tank with two males.
This wasp uses its prickly penis to escape certain death By Nicoletta Lanese published 20 December 22 Male mason wasps have no venom, but they can still stab predators with their genitals.
Three chimps shot dead and four remain on the loose after mysterious zoo escape By Ben Turner published 17 December 22 The zoo is now being investigated for a breach of animal rights protections.
Ancestors of 'veggie' dinosaurs actually feasted on meat By Jennifer Nalewicki published 16 December 22 Researchers analyzed the teeth of the earliest dinosaurs to determine what they ate.
American black bears are evolving to have cinnamon-colored coats, study finds By Jennifer Nalewicki published 16 December 22 For the past 9,000 years, American black bears have slowly been turning red due to a genetic variant.
Scientists finally discovered the snake clitoris, and they're 'very excited' By Joanna Thompson published 16 December 22 For the first time, clitorises have been documented in nine different species of snakes from four families.
Likeness of Cambrian critter finally revealed, and it looks like a taco By Jennifer Nalewicki published 15 December 22 Thanks to soft-tissue preservation, we now know what Tuzoia, a Cambrian arthropod first discovered 100 years ago, actually looked like.
Lost remains of last known Tasmanian tiger found hidden in museum cabinet By Jennifer Nalewicki published 14 December 22 A female Tasmanian tiger that died in 1936, not a male named Benjamin, was actually the last surviving member of this extinct species. The female's remains had been hidden in museum storage.
Male jaguar rivals pair up for years in unexpected bromances By Harry Baker published 13 December 22 Researchers in South America have observed two examples of never-before-seen alliances between rival male jaguars.
Which animal species has existed the longest? By Patrick Pester published 12 December 22 "Living fossils" like Triops tadpole shrimps are believed to have rubbed shoulders with the dinosaurs, but which animal has been on Earth the longest?
Mangled 'dragon' fossils were cooked by ancient continents colliding to form Pangaea By Harry Baker published 9 December 22 Warped amphibian-like fossils in Ireland were likely transformed by superheated fluids that were released as ancient continents crashed into one another around 300 million years ago.
Did long-necked dinosaurs' whip-like tails really break the sound barrier? Not so fast. By Jennifer Nalewicki published 9 December 22 New research contradicts the claim that diplodocids could whip their tails at supersonic speeds. Instead, it was a (still impressive) 62 mph.
Your dog's genes, but not necessarily its breed, play a big role in its behavior By Amy Arthur published 8 December 22 Humans began selectively breeding dogs around 2,000 years ago, and these genes play a role in your pup's behavior, a new study of 4,000 purebred, mixed-breed and wild dogs finds.
Oddly modern skull raises new questions about the early evolution of birds By Stephanie Pappas published 8 December 22 A fossil skull from a toothy early relative of today's birds shows a weirdly modern skull configuration, raising new questions about the early evolution of birds.
'Jousting ankylosaurs' whacked their peers with their 'sledgehammer-like tails' By Jennifer Nalewicki published 8 December 22 Not only did ankylosaurs like "Zuul" use their tails as weapons against potential predators, but they also used them to battle their peers.
Mammals were already poised to take over the world before the dino-killing asteroid struck By Nicoletta Lanese published 7 December 22 Ancient mammals were better adapted than nonavian dinosaurs to survive the Chicxulub asteroid impact.
Heartbreaking photo reveals a baby baboon still clinging to its dead mother as she's carried away by a leopard By Stephanie Pappas published 7 December 22 The annual Wildlife Photographer of the Year Competition People's Choice shortlist highlights animals from ecosystems across Earth.
Monstrous 'gorgons' survived a mass extinction, but they were a 'dead clade walking' By Laura Geggel published 5 December 22 About 90% of all species went extinct during the "Great Dying" around 252 million years ago, but in the case of one paleo-beast — the so-called gorgon — reports of its death were greatly exaggerated, new research finds.
