Search Results for: antarctica
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1,397 results
1,397 results for: antarctica
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Letters to the editor
Invertebrate enigmas I found the recent article “Evolutionary enigmas” (SN: 5/18/13, p. 20) fascinating because I know of another example of an invertebrate animal possessing a “strictly vertebrate” quality. As a high school human anatomy and physiology teacher, I sometimes have my students test the effects of the constituents in cigarette smoke on live Daphnia […]
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- Life
Penguin DNA evolving faster than thought
Comparing the DNA in modern birds to that in ancient generations shows molecular evolution happens at varying rates, and that each species has its own rate of evolution.
- Paleontology
Major eruption cooled the climate but went unnoticed
Ice-core records suggest that a major 1809 eruption cooled Earth even before the Tambora eruption and ‘the year without a summer’.
- Climate
Acidifying ocean may stifle phytoplankton
Chemical changes in seawater make a key nutrient less available to these organisms.
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Antarctica: An Intimate Portrait of a Mysterious Continent by Gabrielle Walker
A science writer takes readers on a journey to the bottom of the Earth through firsthand accounts of her travels with scientists. Houghton Mifflin Harcourt, 2013, 388 p., $27
- Earth
Cold and Deep: Antarctica’s Lake Vostok has two big neighbors
Trapped beneath Antarctica's kilometers-thick ice sheet are two immense bodies of water that may harbor ecosystems that have been isolated for millions of years.
- Ecosystems
Antarctic birds are breeding later
Rising global temperatures are causing Arctic birds to breed earlier in the spring, but for Antarctic birds, the reverse is true.
- 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.
- Earth
Warming is accelerating global water cycle
Fresh water evaporates from the oceans, rains out over land and then runs back into the seas. A new study finds evidence that global warming has been speeding up this hydrological cycle recently, a change that could lead to more violent storms. It could also alter where precipitation falls — drying temperate areas, those places where most people now live.
- Humans
Arctic ozone: ‘Hole’ or just not whole?
This past spring, the Arctic stratosphere’s ozone layer suffered unprecedented depletion. But whether the record loss constituted a “hole” depends on which experts you consult.
- Humans
Contrasting the concerns over climate and ozone loss
On November 7, ozone and climate scientists met in Washington, D.C., to discuss whether the history of stratospheric ozone protection offered a useful case study about how to catalyze global action on carbon dioxide and other greenhouse gases. The simple answer that emerged: No.
