6,899 results
6,899 results for: Bears
- Animals
Den Mothers: Bears shift dens as ice deteriorates
As Arctic ice has dwindled, pregnant polar bears in northern Alaska have become more likely to dig their birthing dens on land or nearshore ice than on floating masses of sea ice.
- Earth
Light reaches deep in southeast Pacific
In a remote part of the southeastern Pacific where marine life is sparse, ultraviolet light penetrates to unprecedented depths.
- Health & Medicine
Nerve Link: Alzheimer’s suspect shows up in glaucoma
Amyloid-beta, the protein fragment implicated in Alzheimer's disease, may also play a role in glaucoma.
- Ecosystems
Tracing Tahitian vanilla
The discovery of Tahitian vanilla’s heritage could set off a custody battle between nations.
- Life
How the snake got its fangs
A study of snake embryos suggests that fangs evolved once, then moved around in the head to give today’s snakes a variety of bites.
- Plants
Bittersweet fruits
A new study provides strong evidence that fruits harm predators with the same chemicals that, for example, give chili peppers their spice.
- Humans
Little big people
New fossil discoveries elevate ancient Pacific islanders, with disputed implications for controversial hobbit remains in Indonesia.
- Life
FDA releases guidelines for genetically modified animals
Draft rules lay out policies for approving altered animals, including those used for food.
- Humans
Stone Age seafood fans
Excavations in two Gibraltar caves suggest that Neandertals, like modern humans, regularly visited the Mediterranean shore to complement a land-based diet with seafood
- Chemistry
How hot was it?
Scientists have created heat-sensing polymers that indicate exposure to high temperatures by changing color under ultraviolet light.
- Anthropology
Scripted Stone: Ancient block may bear Americas’ oldest writing
A slab of stone found by road builders in southern Mexico may contain the oldest known writing in the Americas, although some scientists regard the nearly 3,000-year-old inscriptions cautiously.
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Concentrated Guidance: Attention training gives kids a cognitive push
A brief course on how to pay attention boosts children's scores on either intelligence or attention tests, depending on their age.
