6,896 results
6,896 results for: Bears
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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.
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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."
- 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.
- Earth
It’s high tide for ice age climate change
Tides may sometimes be strong enough to tug Earth into an ice age.
- 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.
- 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.
- 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.
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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.
- Earth
Candid cameras catch rare Asian cats
Remote cameras have confirmed that despite 30 years of armed conflict, jungle cats and many other large mammals continue to thrive in Cambodia.
- Planetary Science
Martian leaks: Hints of present-day water
In some of the coldest regions on Mars, water appears to have recently gushed from just beneath the surface, running down crater walls and steep valleys.
