Search Results for: Vertebrates
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1,545 results
1,545 results for: Vertebrates
- Paleontology
An ancient reptile’s fossilized skin reveals how it swam like a seal
A reptile fossil is the first of its kind with skin and partially webbed feet, possibly showing how later species like plesiosaurs adapted to water.
- Paleontology
Sloths once came in a dizzying array of sizes. Here’s why
A new fossil and DNA analysis traces how dozens of sloth species responded to climate shifts and humans. Just two small tree-dwelling sloths remain today.
- Animals
The mystery of how iguanas crossed the Pacific Ocean may be solved
The iguanas' 8,000-kilometer trip — one-fifth of the Earth’s circumference — is the longest made by a flightless land vertebrate.
- Life
A sixth mass extinction? Not so fast, some scientists say
A new analysis suggests that recent extinctions have been rare, limited mostly to islands and slowing. But others argue this is all just semantics.
- Paleontology
This exquisite Archaeopteryx fossil reveals how flight took off in birds
Analyses unveiled never-before-seen feathers and bones from the first known bird, strengthening the case that Archaeopteryx could fly.
- Paleontology
Could Spinosaurus swim? The fierce dinosaur ignites debate
Researchers are still divided about whether Spinosaurus was a swimmer or a wader. What’s clear is that confirming the first swimming dinosaur would be a game-changer.
- Anthropology
‘Dragon Man’ skull may be the first from an enigmatic human cousin
Ancient proteins and DNA may peg a 146,000-year-old Chinese skull as the most complete fossil to date from Denisovans, a puzzling line of Asian hominids.
- Life
A skull found in Egypt shows this top predator stalked ancient Africa
Archaeologists uncovered a fossilized skull of an ancient sharp-toothed predator that likely hunted early elephants and primates.
- Animals
Poop is on the menu for a surprising number of animals
A new tally finds dozens of species giving food a second go-round, from babies boosting their microbiomes to adults seeking easier-to-access nutrition.
- Anthropology
Denisovans inhabited Taiwan, new fossil evidence suggests
An expanding geographic range for these close Neandertal relatives leaves Denisovans' evolutionary status uncertain.
- Animals
Fever’s link with a key kind of immunity is surprisingly ancient
When sick, Nile tilapia seek warmer water. That behavioral fever triggers a specialized immune response, hinting the connection evolved long ago.
- Animals
More new geckos have been found hiding in Southeast Asia’s limestone towers
Nearly 200 new gecko species found in living in karst landscapes reveal the rugged regions as dynamic areas of speciation.
