Search Results for: Polar Bears
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604 results
604 results for: Polar Bears
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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, […]
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The Great White Bear: A Natural and Unnatural History of the Polar Bear by Kieran Mulvaney
Starting with the fact that polar bears have black skin, this book offers surprises and up-to-date information about the Arctic’s iconic top predator. Houghton Mifflin Harcourt, 2011, 251 p., $26.
- Earth
Climate action could save polar bears
Cutting fossil fuel emissions soon would retain enough sea ice habitat for threatened species, scientists say.
- Earth
Carbonation brings diamonds to surface
Chemical reactions deep inside the Earth fuel magma’s gem-laden upward journey.
- Earth
Earth & Environment
Climate change brings a thirstier West and thinner polar bears, plus parsing the sun and moon's effects in this week's news.
- Chemistry
Molecules/Matter & Energy
Sticky graphene, dried-up coffee, a panda pregnancy test and more in this week’s news.
- Humans
Sarah’s tale of Arctic warming
Over a half-century or so, Sarah James' town of some 150 Athabascan Indians has watched as the formerly extreme but fairly predictable climate in this amazingly remote region of inland Alaska has become warmer and more erratic. Overall, that’s definitely not been a change for the better, she says. James ventured to South Florida this week — and the Society of Environmental Journalists’ annual meeting — to describe what it’s like to weather life on the frontlines of climate change.
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Venus Unveiled
Spacecraft finds Earthy features on sister planet.
- Paleontology
Ancient DNA suggests polar bears evolved recently
A study of a rare Norwegian fossil narrows down when polar bears evolved and finds they are closely related to modern-day brown bears in Alaska.
