6,875 results
6,875 results for: Bears
- Climate
Human CO2 emissions put Arctic on track to be ice-free by 2050
Sea ice is shrinking by about three square meters for each metric ton of carbon dioxide emitted, new research suggests.
- Genetics
Endurance training leaves no memory in muscles
Unlike strength training, endurance workouts left no genetic trace months later, calling into question idea of a general muscle memory.
- Health & Medicine
The opioid epidemic spurs a search for new, safer painkillers
Today’s opioids stop pain — but they’re also dangerous. Scientists are hunting for replacements.
- Animals
Study ranks Greenland shark as longest-lived vertebrate
Radiocarbon in eye lenses suggests mysterious Greenland sharks might live for almost 400 years.
- Animals
Polar bears’ ‘walking hibernation’ not much of an energy saver
Summer’s “walking hibernation” doesn’t shut down polar bears as much as winter does.
- Climate
Year in review: Sea ice loss will shake up ecosystems
Researchers are studying the complex biological consequences of polar melting and opening Arctic passageways.
- Animals
Feral dogs take a bite out of Andean wildlife
A survey of a remote park in Ecuador finds feral dogs are a problem for many species of native mammals.
- Life
Yeasts hide in many lichen partnerships
Yeasts newly discovered in common lichens challenge more than a century of thinking about what defines the lichen symbiosis.
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- Life
How Paralympic sprinters lose speed on curves
Amputee runners may lose more speed on curves when the leg on the inside of the curve is the one bearing a prosthetic, a biomechanics study finds.
- Paleontology
With dinosaurs out of the way, mammals had a chance to thrive
The animals that lived through the great extinction event had a range of survival strategies to get them through.
- Paleontology
Fossil reveals an ancient arthropod’s nervous system
A roughly 520-million-year-old fossil preserved an ancient arthropod’s ventral nerve cord and peripheral nerves.
