6,898 results
6,898 results for: Bears
- Health & Medicine
Natural antidepressant has its limits
St. John's wort, a popular ingredient in herbal remedies, may not help people with moderate or severe forms of depression.
- Anthropology
Human ancestors made ancient entry to Java
Layers of hardened volcanic ash on the Indonesian island of Java have yielded evidence that Homo erectus reached eastern Asia by 1.5 million years ago and remained there until about 1 million years ago.
- Astronomy
Gamma-ray bursts reveal distant galaxies
A gamma-ray burst recorded Feb. 22, one of the brightest ever detected, is proving to be the strongest evidence so far that these cosmic flashbulbs originate in star-forming regions of distant galaxies and are generated by the explosive death of massive stars.
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When parents let kids go hungry
Researchers comparing Northern and Southern birds have confirmed a prediction about parents protecting themselves at their offsprings' expense.
- Paleontology
Did fibers and filaments become feathers?
A variety of filamentary structures on the fossil of a small theropod dinosaur recently found in China may provide new insight into the evolution of feathers.
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For some birds, Mr. Wrong can be alright
What looks like the ultimate bad choice in romance—a mate from a different species—in some conditions may not be so dumb after all.
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Dolphins may seek selves in mirror images
Dolphins apparently recognize their own reflections.
- Health & Medicine
Lung cancer gene has gender bias
The X chromosome's gastrin-releasing peptide receptor gene is turned on by nicotine to produce a protein that promotes lung cancer, a combination of factors that could explain why women are more susceptible to the disease than men are.
- Health & Medicine
Fused cells hold promise of cancer vaccines
A vaccine composed of tumor cells fused to immune cells has helped several people survive advanced kidney cancer.
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Lady-killing genes offer pest control
Two new fruit fly lines—with females that die on cue—could lead to changes in pest control.
- Math
Random packing of spheres
A new definition of random packing allows a more consistent and mathematically precise approach to characterizing disordered arrangements of identical spheres.
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How whales, dolphins, seals dive so deep
The blue whale, bottlenose dolphin, Weddell seal, and elephant seal cut diving energy costs 10 to 50 percent by simply gliding downward.
