6,898 results
6,898 results for: Bears
- Space
Six months in space leads to a decade’s worth of long-term bone loss
Even after a year of recovery in Earth’s gravity, astronauts who’d been in space six months or more still had bone loss equal to a decade of aging.
- Paleontology
Megatooth sharks may have been higher on the food chain than any ocean animal ever
Some megalodons and their ancestors were the ultimate apex predators, outeating all known marine animals, researchers report.
- Paleontology
Feathers may have helped dinosaurs survive the Triassic mass extinction
New data show that dinosaurs were able to weather freezing conditions about 202 million years ago, probably thanks to warm feathery coats.
- Astronomy
‘Goldilocks’ stars may pose challenges for any nearby habitable planets
Orange dwarfs emit far-ultraviolet light long after birth, stressing the atmospheres of potentially life-bearing worlds.
- Paleontology
Pterosaurs may have had brightly colored feathers on their heads
The fossil skull of a flying reptile hints that feathers originated about 100 million years earlier than scientists thought.
- Paleontology
Glowing spider fossils may exist thanks to tiny algae’s goo
Analyzing 22-million-year-old spider fossils from France revealed that they were covered in a tarry black substance that fluoresces.
- Anthropology
North America’s oldest skull surgery dates to at least 3,000 years ago
Bone regrowth suggests the man, who lived in what’s now Alabama, survived a procedure to treat brain swelling by scraping a hole out of his forehead.
- Animals
Leeches expose wildlife’s whereabouts and may aid conservation efforts
DNA from the blood meals of more than 30,000 leeches shows how animals use the protected Ailaoshan Nature Reserve in China.
- Psychology
Latin America defies cultural theories based on East-West comparisons
Theories for how people think in individualist versus collectivist nations stem from East-West comparisons. Latin America challenges those theories.
- Humans
Eating meat is the Western norm. But norms can change
A meat-heavy diet, with its high climate costs, is the norm in the West. So social scientists are working to upend normal.
- Paleontology
A new saber-toothed mammal was among the first hypercarnivores
A 42-million-year-old jawbone with slicing teeth and a gap to fit saberlike teeth is pegged to a new species of the mysterious Machaeroidine group.
- Earth
The mysterious Hiawatha crater in Greenland is 58 million years old
An impact crater spotted in 2015 in Greenland is far too old to be connected to the Younger Dryas cold snap from 13,000 years ago, a study suggests.
