Search Results for: antarctica
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1,400 results
1,400 results for: antarctica
- Earth
Ozone hole might not recover until the year 2065
The ozone-free zone that develops high in the atmosphere over Antarctica each summer as the result of the presence of chlorine- and bromine-containing chemicals may not heal until 15 years later than previously projected.
- Earth
Satellite makes finest map yet of Antarctica
Using data gathered by a satellite launched almost 3 years ago, scientists have assembled the most comprehensive high-resolution map of Antarctica that's ever been made.
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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.
