Search Results for: Polar Bears
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604 results
604 results for: Polar Bears
- Animals
Polar bears are being exposed to more pathogens as the climate warms
Polar bears have been exposed to more viruses, bacteria and parasites in recent decades, a new study shows, possibly acquiring the germs in their diet.
- Materials Science
A fiber inspired by polar bears traps heat as well as down feathers do
Scientists took a cue from polar bear fur to turn an ultralight insulating material into knittable thread.
- Tech
Feather-inspired airplane flaps could boost flight performance
Rows of flaps inspired by bird wing feathers improve airfoil performance by boosting lift, reducing drag and mitigating stall.
- Planetary Science
Scientists find a long-sought electric field in Earth’s atmosphere
The Earth’s ambipolar electric field is weak but strong enough to control the shape and evolution of the upper atmosphere.
- Animals
Explore the past, present and future of ‘Eight Bears’
The book invites readers to meet the eight species of bears left on Earth and looks at how humans are shaping their future, for better or for worse.
- Health & Medicine
Bird flu has infected a person after spreading to cows. Here’s what to know
H5N1 has wreaked havoc on birds around the globe and occasionally made the jump to mammals, including cows. The risk to people remains low.
- Health & Medicine
Bird flu has been invading the brains of mammals. Here’s why
Although H5N1 and its relatives can cause mild disease in some animals, these viruses are more likely to infect brain tissue than other types of flu.
- 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.
- Genetics
Freeze-drying turned a woolly mammoth’s DNA into 3-D ‘chromoglass’
A new technique for probing the 3-D structure of ancient DNA may help scientists learn how extinct animals functioned, not just what they looked like.
- Animals
Here’s how polar bears might get traction on snow
Microstructures on the Arctic animals’ paws might offer extra friction that keeps them from slipping on snow, a new study reports.
- Ecosystems
Some polar bears in Greenland survive on surprisingly little sea ice
“Glacial mélange” could provide a last refuge for some bears as the Earth warms, but climate action is needed to preserve the species, researchers say.
- Animals
A bird flu outbreak is sweeping the globe. Its long-term effects are unclear
A reporter’s recent trip to the Galápagos offered a chance to reflect on the bird flu outbreak, which has killed millions of birds and other animals.
