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Latest Ice ages Stories

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2007-01-23 15:41:02

The transition from an ice age to an ice-free planet 300 million years ago was highly unstable, marked by dips and rises in carbon dioxide, extreme swings in climate and drastic effects on tropical vegetation, according to a study published in the journal Science Jan. 5. "This is the best documented record we have of what happens to the climate system during long-term global warming following an ice age," said Isabel Montañez, professor of geology at the University of...

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2007-01-04 17:39:51

The transition from an ice age to an ice-free planet 300 million years ago was highly unstable, marked by dips and rises in carbon dioxide, extreme swings in climate and drastic effects on tropical vegetation, according to a study published in the journal Science Jan. 5. "This is the best documented record we have of what happens to the climate system during long-term global warming following an ice age," said Isabel Montanez, professor of geology at the University of California, Davis, and...

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2006-08-31 12:45:00

Imagine a shift in the Earth so profound that it could force our entire planet to spin on its side after a few million years, tilting it so far that Alaska would sit at the equator. Princeton scientists have now provided the first compelling evidence that this kind of major shift may have happened in our world's distant past. By analyzing the magnetic composition of ancient sediments found in the remote Norwegian archipelago of Svalbard, Princeton University's Adam Maloof has lent credence...

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2006-07-28 14:06:08

The Earth Institute at Columbia University -- Each year nearly 40,000 tons of cosmic dust fall to Earth from outer space. Now, the first successful chronological study of extraterrestrial dust in Antarctic ice has shown that this amount has remained largely constant over the past 30,000 years, a finding that could help refine efforts to understand the timing and effects of changes in the Earth's past climate. The same study also used an improved analytical technique to show that dust carried...

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2006-06-07 08:05:00

It has been 2.3 billion years since Earth's atmosphere became infused with enough oxygen to support life as we know it. About the same time, the planet became encased in ice that some scientists speculate was more than a half-mile deep. That raises questions about whether complex life could have existed before "Snowball Earth" and survived, or if it first evolved when the snowball began to melt. New research shows organisms called eukaryotes - organisms of one or more complex cells that...

2006-05-31 04:50:00

By Alister Doyle, Environment Correspondent OSLO -- Global warming is adding new threats to marine life in the almost land-locked Baltic Sea, where fish are already struggling in polluted, brackish waters, a leading expert said on Wednesday. "The Baltic Sea is already in bad shape ... life there is in a very delicate balance," Hans von Storch, a professor at the Institute of Coastal Research in Germany who chairs a group of 80 scientists from 12 nations studying the Baltic, told Reuters....

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2006-01-20 17:40:00

WASHINGTON -- Mysterious debris fields found far from the poles on Mars were made by glaciers, possibly formed just like glaciers are on Earth -- by the buildup of snow, researchers said on Friday. The glaciers would have resembled those found on Earth in places such as Mount Kilimanjaro in Africa or the Andean peaks in South America, the researchers report in Friday's issue of the journal Science. They probably formed when Mars was tilted on its side five million years ago, Brown University...

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2006-01-10 05:45:00

NASA -- New scientific findings are strengthening the case that the oceans and climate are linked in an intricate dance, and that rapid climate change may be related to how vigorously ocean currents move heat between low and high latitudes. The research, by Candace Major, an investigator at Woods Hole Oceanographic Institution, was presented today at a press conference at the fall meeting of the American Geophysical Union in San Francisco. In the North Atlantic region, the glacial climate...

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2005-12-17 18:20:00

NASA -- Glaciers, rivers and shifting tectonic plates have shaped mountains over millions of years, but earth scientists have struggled to understand the relative roles of these forces and the rates at which they work. Now, using a new technique, researchers at the University of Michigan, California Institute of Technology and Occidental College have documented how fast glaciers eroded the spectacular mountain topography of the Coast Mountains of British Columbia. Their work is described in...

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2005-11-25 10:15:00

WASHINGTON -- Scientists are looking back to a time when "greenhouse gases" were not the problem they are today, and it is giving them a clearer picture of how people are making it worse. A team of European researchers analyzed tiny air bubbles preserved in Antarctic ice for millennia and determined there is more carbon dioxide in the atmosphere now than at any point during the last 650,000 years. The study by the European Project for Ice Coring in Antarctica, published Friday in the journal...


Word of the Day
vermicular
  • Like a worm in form or movement; vermiform; tortuous or sinuous; also, writhing or wriggling.
  • Like the track or trace of a worm; appearing as if worm-eaten; vermiculate.
  • Marked with fine, close-set, wavy or tortuous lines of color; vermiculated.
  • A form of rusticated masonry which is so wrought as to appear thickly indented with worm-tracks.
This word ultimately comes from the Latin 'vermis,' worm.
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