Search Results for: Polar Bears
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581 results
- Animals
Spotted seals hear well in and out of water
Spotted seals, native to the northern parts of the Pacific, hear frequencies that may mean they are susceptible to the effects of anthropogenic noise.
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Polar bears have seen hard times
Two genetic studies extend the Arctic icon’s lineage way back.
- Astronomy
Quiet maximum
By almost any measure, this solar maximum has been pathetic. No more than 67 sunspots have appeared in a month so far; at the last peak, in 2000, that number was above 120.
- Life
Polar bears’ ancient roots pushed way back
Full genetic blueprints suggest the animals split from brown bears millions of years ago.
- Tech
Designing robots to help in a disaster
Ideally, robots could take over for human crews in disaster zones. But seemingly simple tasks, such as walking, communicating and staying powered up, still pose big challenges.
- Life
Polar bears older than previously thought
New analysis reveals that the Arctic species dates back to about 600,000 years ago.
- Health & Medicine
Mammography’s limits becoming clear
It may be time to move way from blanket recommendations about mammography and empower women to decide for themselves, new work suggests.
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Science News Top 25
Science News reviews the year in science with a compilation and analysis of the most fascinating stories reported in the magazine. Also highlighted are reader favorites, debunked science and the year's weirdest stories.
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- Life
DNA hints at polar bears’ Irish ancestry
Mitochondrial genetic analysis suggests a bit o’ hybridizing long ago with brown bears on the Emerald Isle.
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Frozen Planet: A World Beyond Imagination by Alastair Fothergill and Vanessa Berlowitz
Journey with four polar denizens — polar bear, Arctic fox, Adélie penguin and wandering albatross — through seasonal changes in this companion to a BBC television series. Firefly Books, 2011, 312 p., $39.95
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2011 Science News of the Year: Life
Multicellular life from a test tube In less than two months, yeast in a test tube evolved from single-celled life to bristly multicellular structures. The new, snowflakelike forms act like multicellular organisms, reproducing by splitting when they reach large sizes and evolving further in response to harsh conditions, William Ratcliff of the University of Minnesota, […]
