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Latest Ice ages Stories

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2009-06-03 08:06:07

A new University of Florida study shows mammals change their dietary niches based on climate-driven environmental changes, contradicting a common assumption that species maintain their niches despite global warming. Led by Florida Museum of Natural History vertebrate paleontologist Larisa DeSantis, researchers examined fossil teeth from mammals at two sites representing different climates in Florida: a glacial period about 1.9 million years ago and a warmer, interglacial period about 1.3...

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2009-05-28 12:01:50

U.S. scientists are challenging the prevailing views of the effects of the so-called Snowball Earth glaciations on life on Earth. Researchers from the University of California-Santa Barbara analyzed microfossils found in rocks at the bottom of the Grand Canyon to challenge current theories concerning the effects of the glaciers occurring approximately 635 million to 726 million years ago. Those glaciations are thought to have been responsible for the widespread deaths of early life on Earth....

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2009-05-26 15:17:08

New fossil findings discovered by scientists at UC Santa Barbara challenge prevailing views about the effects of "Snowball Earth" glaciations on life, according to an article in the June issue of the journal Nature Geoscience. By analyzing microfossils in rocks from the bottom of the Grand Canyon, the authors have challenged the view that has been generally assumed to be correct for the widespread die-off of early life on Earth. "Snowball Earth" is the popular term for glaciations that...

2009-05-08 12:24:17

Earth's earliest ice age could have been caused by an atmospheric rise in oxygen reacting with methane, a greenhouse gas, a geologist in Maryland said. This singular event had a profound effect on the climate, and also on life, said Alan J. Kaufman, a geology professor at the University of Maryland. Kaufman and a team of international scientists found evidence the oxygenation of Earth's atmosphere coincided with the first widespread ice age on the planet 2 1/2 billion years ago. They theorize...

ac377d32bb0b681a55a7dcee927e87251
2009-04-20 14:25:00

Ice ages are the greatest natural climate changes in recent geological times. Their rise and fall are caused by slight changes in the Earth's orbit around the Sun due to the influence of the other planets. But we do not know the exact relationship between the changes in the Earth's orbit and the changes in climate. New research from the Niels Bohr Institute indicates that there can be changes in the CO2 levels in the atmosphere that suddenly reach a critical turning point and with that...

cbe94a154c7bef4b7f677d88a3e209871
2009-04-16 11:10:00

A new study analyzing the fluctuations in sea levels during the last time Earth was between ice ages shows that oceans rose some nine feet in only decades due to collapsing ice sheets, the AFP reported. Lead researcher Paul Blanchon, a geoscientist at Mexico's National University, said the findings suggest that such a scenario would redraw coastlines worldwide and unleash colossal human misery. Worst of all, he said it was "now a distinct possibility within the next 100 years." Scientists...

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2009-03-30 07:40:00

Dust trapped deep in Antarctic ice sheets is helping scientists unravel details of past climate change. Researchers have found that dust blown south to Antarctica from the windy plains of Patagonia "“ and deposited in the ice periodically over 80,000 years "“ provides vital information about glacier activity. Scientists hope the findings will help them to better understand how the global climate has changed during the past ice age, and so help predict environmental changes in the...

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2009-02-17 08:34:57

An article published in the prestigious science magazine Nature Geoscience yesterday shows that the period towards the end of the ice age was engraved by extreme and short-lived variations, which finally terminated the ice age. A group of scientists at the Bjerknes Centre for Climate Research and the University of Bergen in Norway, together with colleagues at ETH, Zrich, combined terrestrial and marine proxy palaeo-data covering the latest part of the ice age to improve our understanding of...

2009-02-11 12:13:55

U.S. scientists say they have found proof that Earth's sea level was more than 70 feet (21 meters) higher 400,000 years ago than it is now. Storrs Olson, a zoologist at the Smithsonian's National Museum of Natural History, and geologist Paul Hearty of the Bald Head Island Conservancy said they discovered sedimentary and fossil evidence in the walls of a limestone quarry in Bermuda that documents the rise in sea level during an interglacial period of the Middle Pleistocene. Although Hearty and...

359149a3bd565a5edbfa8a81fec59d001
2009-01-12 08:10:00

Scientists are now making an alarming claim that the earth is on the brink of entering another Ice Age that could last the next 100,000 years. They believe a 12,000-year warming period is currently winding down. They say ice cores, ocean sediment cores, the geologic record, and studies of ancient plant and animal populations all demonstrate a regular cyclic pattern of Ice Age patterns, separated by intervening warm interglacials, each lasting about 12,000 years. Experts point out that most...