6,895 results
6,895 results for: Bears
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Bdelloids: No sex for over 40 million years
Researchers find the strongest evidence yet for creatures that have evolved asexually for millions of years.
- Paleontology
Fossils Hint at Who Left Africa First
Fossil skulls found in central Asia date to 1.7 million years ago and may represent the first ancestral human species to have left Africa.
- Astronomy
Balloon 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.
- Earth
Impurities 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.
- Earth
It’s high tide for ice age climate change
Tides may sometimes be strong enough to tug Earth into an ice age.
- Archaeology
Early 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.
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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."
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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.
- 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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Lady-killing genes offer pest control
Two new fruit fly lines—with females that die on cue—could lead to changes in pest control.
- 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.
- 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.
