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1,400 results for: antarctica
- Earth
Geologists take magnetic view through ice
A new map of the magnetic anomalies in Antarctica and the seafloor surrounding the continent is giving researchers a fresh tool to use in analyzing geologic features that lie hidden beneath thousands of feet of ice or storm-tossed seas.
By Sid Perkins -
18965
The article says that evidence of past climate variations in Antarctica may invalidate global warming as a cause for the recent demise of several ice shelves in that area. Isn’t the length of time over which the changes occurred the critical thing? If the changes are occurring over roughly the same time span as they […]
By Science News - Earth
Once Upon a Lake
As Earth warmed at the end of the last ice age, the immense volumes of fresh water that occasionally and catastrophically spilled from Lake Agassiz—the long-defunct lake that formed as the ice sheet smothering Canada melted—may have caused global climate change and sudden rises in sea level.
By Sid Perkins -
Science News of the Year 2002
A review of important scientific achievements reported in Science News during the year 2002.
By Science News -
Science News of the Year 2002
A review of important scientific achievements reported in Science News during the year 2002.
By Science News - Earth
Big Bergs Ahoy!
Although the break-up of Antarctica's northernmost ice shelves has been linked to warmer temperatures in the area, the cause of the unusual number of large icebergs calving from the continent's southern ice shelves last year was likely not global warming.
By Sid Perkins - Earth
Shifting Sands
Sand dunes can provide scientists with clues about ancient patterns of wind and precipitation.
By Sid Perkins - Paleontology
Completing a titan by getting a head
When paleontologists unearthed the skeleton of a 70-million-year-old titanosaur in Madagascar in the late 1990s, they also recovered something that had been missing from previous such finds: a skull that matched the body.
By Sid Perkins - Astronomy
Revved-Up Universe
Astronomers are busy testing the seemingly bizarre notion that the expansion of the universe is accelerating.
By Ron Cowen - Earth
Presto, Change-o!
Compared with the snail's-pace processes that normally shape Earth's surface, the impacts of extraterrestrial objects change our planet's geology in a flash.
By Sid Perkins - Earth
Lasers show atmosphere differs from models
New observations of the middle and upper atmosphere over Earth's polar regions may require scientists to revamp their mathematical models of temperature and other environmental conditions at high altitudes.
By Sid Perkins - Earth
Sediments show bipolar melting cycle
Both the North and South Poles have experienced regular and simultaneous periods of significant melting during the past 3 million years, according to sediments from the ocean floor at high latitudes.
By Sid Perkins