6,900 results
6,900 results for: Bears
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Animal Origins: Genome reveals early complexity
Analysis of DNA from a choanoflagellate, the closest known living nonanimal relative of animals, allows scientists to infer the genetic starter kit possessed by the first animal.
- Plants
Promiscuous orchids
When pollinators aren't loyal to a single species of orchid, the plants maintain their species integrity by stymieing reproduction.
- Animals
Moths’ memories
Sphinx moths appear to remember experiences they had as caterpillars, suggesting some brain cells remain intact through metamorphosis.
- Astronomy
In the Beginning: More early clues for life at home, out there
Astronomers move closer to understanding how life arose on Earth and how it could arise elsewhere.
- 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.
- Anthropology
European Roots: Human ancestors go back in time in Spanish cave
Excavations of a cave in northern Spain have yielded a fossil jaw and tooth that provide the first solid evidence that human ancestors reached Western Europe more than 1 million years ago.
- Materials Science
Live Another Day: African insect survives drought in glassy state
When dehydrated, the larvae of an African fly replace the water in their cells with a sugar, which solidifies and helps keep cellular structures intact.
- 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.
- Humans
Bear deadline
Court calls for the already overdue decision on listing polar bears as a threatened species.
- Animals
Polar bears listed
Polar bear declared "threatened," but Secretary limits decision's impact.
- Climate
Boreal forests shift north
As forests move northward and to higher elevations, they alter ecosystems and threaten to further heat the Arctic's already warming climate.
- 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.
