Search Results for: Bears
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6,901 results for: Bears
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AnimalsHyena androgens exact high cost
Blocking androgens for spotted hyenas before they're born shows that the exposure of a female fetus to male hormones normally takes a heavy physical toll when females bear their own pups.
By Susan Milius -
PlantsSunflower genes don’t fit pattern
Comparison between crop and wild sunflower genes suggests that the plant followed an easy route to domestication.
By Susan Milius -
Health & MedicineLung 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.
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Health & MedicineFused cells hold promise of cancer vaccines
A vaccine composed of tumor cells fused to immune cells has helped several people survive advanced kidney cancer.
By John Travis -
Lady-killing genes offer pest control
Two new fruit fly lines—with females that die on cue—could lead to changes in pest control.
By Susan Milius -
MathRandom 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.
By Susan Milius -
Cooperative strangers turn a mutual profit
In social exchanges, monkeys and people often appear to act according to the principle that "one good turn deserves another."
By Bruce Bower -
ArchaeologyEarly New World Settlers Rise in East
New evidence supports the view that people occupied a site in coastal Virginia at least 15,000 years ago.
By Bruce Bower -
EarthIt’s high tide for ice age climate change
Tides may sometimes be strong enough to tug Earth into an ice age.
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EarthImpurities clock crystal growth rates
A novel method for measuring tiny amounts of hydrogen-containing impurities allows researchers to determine growth rates along different directions in a quartz crystal.
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AstronomyBalloon Sounds Out the Early Universe
A balloon-borne experiment circling Antarctica has measured the curvature of the universe and revealed that it's perfectly flat.
By Ron Cowen