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Latest Ice ages Stories

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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...

2005-10-19 14:30:26

The ice ages made massive changes to the Earth's landscape The ice ages made massive changes to the Earth's landscape. But what was happening below the ice in the oceans? Research by marine scientists reveals that it was a time of mass destruction as whole communities of animals were wiped out by ice sheets scouring the sea floor. In the past it has been thought that these ecosystems somehow dodged extinction by recolonising from nearby habitats that escaped obliteration. But researchers at...

2005-09-29 19:30:00

A study that applied innovative techniques to previously unexamined rock formations has turned up strong evidence on the "Slushball Earth" side of a decades-long scientific argument. The study appears in the Sept. 29 Science Express. The lead author is Alison Olcott, a Ph.D. student of earth sciences in the USC College of Letters, Arts and Sciences. Geologists agree that prehistoric Earth was locked in a deep freeze during Precambrian times, about 750 to 600 million years ago. They disagree...

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2005-08-09 05:20:00

Astrobiology Magazine -- For several years geologists have been gathering evidence indicating that Earth has gone into a deep freeze on several occasions, with ice covering even the equator and with potentially devastating consequences for life. The theory, known as "Snowball Earth," has been lacking a good explanation for what triggered the global glaciations. Now, the California Institute of Technology research group that originated the Snowball Earth theory has proposed that the culprit...

2005-06-03 19:30:21

Boulder, Colo. - The June issue of GEOLOGY covers a wide variety of potentially newsworthy subjects. Topics include: discovery of 21 Martian river channels and estimates of their discharge and runoff production; evidence for olivine-rich bedrock on Mars; regional dynamics of global climate change; a challenge to the mantle plume hypothesis; constraints on late Neoproterozoic glaciations; new modeling of pyroclastic currents and possibilities for human survival in 79 A.D. Pompeii; the...