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Latest Ice ages Stories

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2009-06-16 08:55:00

Team investigates the climate of Planet Earth 440 million years ago Geologists at the University of Leicester have shown that an ancient Ice Age, once regarded as a brief "Ëœblip', in fact lasted for 30 million years. They have published their findings and are due to discuss them at a public lecture at the University on Wednesday June 17. Their research suggests that during this ancient Ice Age, global warming was curbed through the burial of organic carbon that eventually lead to...

2009-06-15 16:25:20

Researchers here have used sediment from the deep ocean bottom to reconstruct a record of ancient climate that dates back more than the last half-million years.The record, trapped within the top 20 meters (65.6 feet) of a 400-meter (1,312-foot) sediment core drilled in 2005 in the North Atlantic Ocean by the Integrated Ocean Drilling Program, gives new information about the four glacial cycles that occurred during that period.The new research was presented today at the Chapman Conference on...

2009-06-03 10:05:00

In 1996, an international team of scientists led by the University of Zaragoza (UNIZAR) started to carry out a paleontological survey in the cave of El Mir³n. Since then they have focused on analysing the fossil remains of the bones and teeth of small vertebrates that lived in the Cantabrian region over the past 41,000 years, at the end of the Quaternary. The richness, great diversity and good conservation status of the fossils have enabled the researchers to carry out a paleoclimatic...

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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...

884faa2a157d81895cd80d16cc432b481
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....

41adbb02d7e5f83452ba076e552f15841
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...

21d7b19d9dac3c1d45e78c6dfedeea731
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...


Word of the Day
penuche
  • A fudgelike confection of brown sugar, cream or milk, and chopped nuts.
'Penuche' is a variant of 'panocha,' a coarse grade of sugar made in Mexico. 'Panocha' probably comes from the Spanish 'panoja, panocha,' ear of grain.
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