6,867 results
6,867 results for: Bears
- Animals
Butterfly’s clock linked to compass
The most detailed look yet at the monarch butterfly's daily rhythm keeper suggests it's closer to ancient forms than to the fruit fly's or mouse's inner clock.
- Humans
Our Heritage at Risk
Much of the evidence documenting America's culture is at risk of being damaged or disappearing altogether.
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Letters
Get the real life In the article “Scientists get a second life” (SN: 5/24/08, p. 20), I take exception to Joanna Scott’s statement that “Second Life is real life.” In fairness, one could debate what she means by “life,” but the statement is just too strong to ignore. As technical director at a major theater, […]
- Space
Messages from Mercury
Data collected by the MESSENGER spacecraft as it flew past Mercury last January has revealed the origin of the planet’s magnetic field, discovered evidence of early volcanic activity and provided a first look at the planet’s surface composition.
- Ecosystems
Tracing Tahitian vanilla
The discovery of Tahitian vanilla’s heritage could set off a custody battle between nations.
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Sequencing the dead to save the living
Reviving ancient genomes of long-extinct creatures offers a window into past extinctions—and may help prevent future die outs.
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- Agriculture
Farm life turns male toads female
A detailed inventory of toads in Florida finds that, as land becomes more agricultural, more cane toads resemble females both inside and out.
- Life
Sepsis buster
The Ashwell receptor, a sugar-binding protein on liver cells, helps fight sepsis by clearing blood-clotting factors. The discovery clears up years of mystery surrounding the receptor’s function.
- Earth
Climate fix could deplete polar ozone
Scientists seeking to cool Earth’s climate by injecting sulfuric acid droplets high in the atmosphere might trim rising temperatures but could also destroy much of the ozone in polar regions, a new study suggests.
- Paleontology
Struck from above
Evidence of an extraterrestrial object striking Earth at the height of the last ice age comes from micrometeorites embedded in the tusks of creatures that were grazing the Alaskan tundra when the object burst in the air above.
- Plants
Floral Shocker: Blooms shake roots of flowering-plant family
A tiny aquatic plant, once thought to be related to grasses, raises new questions about the evolution of the earliest flowering plants.
