News tagged with carbon isotopes
Paleoecologists suggest mass extinction due to huge methane release
(PhysOrg.com) -- Micha Ruhl and colleagues from the University of Copenhagen's Nordic Center for Earth Evolution have published a paper in Science where they contend that the mass extinction that occurred at the ...
Space & Earth / Earth Sciences
Jul 22, 2011 |
4.4 / 5 (21) |
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Neanderthals died out earlier than originally believed
(PhysOrg.com) -- According to a newly released report in The Proceedings of the National Academy of Sciences, a newly refined method of radiocarbon dating has found that Neanderthals died off much earlier than o ...
Other Sciences / Archaeology & Fossils
May 10, 2011 |
4.5 / 5 (14) |
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Stalagmite reveals carbon footprint of early Native Americans
A new study led by Ohio University scientists suggests that early Native Americans left a bigger carbon footprint than previously thought, providing more evidence that humans impacted global climate long before ...
Space & Earth / Earth Sciences
Apr 15, 2010 |
3.9 / 5 (16) |
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Supervolcano eruption -- in Sumatra -- deforested India 73,000 years ago
A new study provides "incontrovertible evidence" that the volcanic super-eruption of Toba on the island of Sumatra about 73,000 years ago deforested much of central India, some 3,000 miles from the epicenter, ...
Space & Earth / Earth Sciences
Nov 23, 2009 |
4.5 / 5 (17) |
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Early hominid first walked on two legs in the woods
Among the many surprises associated with the discovery of the oldest known, nearly complete skeleton of a hominid is the finding that this species took its first steps toward bipedalism not on the open, grassy ...
Other Sciences / Archaeology & Fossils
Oct 08, 2009 |
4.8 / 5 (12) |
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Methane-eating microbes can use iron and manganese oxides to 'breathe'
Iron and manganese compounds, in addition to sulfate, may play an important role in converting methane to carbon dioxide and eventually carbonates in the Earth's oceans, according to a team of researchers ...
Space & Earth / Earth Sciences
Jul 09, 2009 |
4.6 / 5 (5) |
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The rise of oxygen caused Earth's earliest ice age
(PhysOrg.com) -- Geologists may have uncovered the answer to an age-old question - an ice-age-old question, that is. It appears that Earth's earliest ice ages may have been due to the rise of oxygen in Earth's ...
Space & Earth / Earth Sciences
May 07, 2009 |
4.6 / 5 (20) |
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Alchemy in Tanzania? Gas Becomes Solid at Surface of Oldoinyo Lengai Volcano
(PhysOrg.com) -- Science has unearthed the secret to what might have been alchemy at Oldoinyo Lengai volcano in Tanzania.
Space & Earth / Earth Sciences
May 06, 2009 |
4.1 / 5 (8) |
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Diet secrets of 'the Royals' -- Elephant tail hair isotopes show cattle out-munch pachyderms
Two weeks after the rains begin, an elephant family named "the Royals" usually switches to a grass diet to bulk up for pregnancy and birth. But when they wandered off their African reserve one rainy season, ...
Apr 13, 2009 |
5 / 5 (3) |
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Rock sleuths: Researchers seek clues to atmospheric changes ahead of animal life
For more than a decade, scientists have dismissed claims that examining carbon-rich rocks could yield clues to the atmospheric and oceanic conditions on Earth hundreds of millions of years ago, but now researchers ...
Space & Earth / Earth Sciences
Mar 20, 2012 |
5 / 5 (1) |
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Toppling Raman shift in supercritical carbon dioxide
(PhysOrg.com) -- Just as a wine glass vibrates and sometimes breaks when a diva sings the right note, carbon dioxide vibrates when light or heat serenades it. When it does, carbon dioxide exhibits a vibrational ...
Feb 29, 2012 |
5 / 5 (1) |
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Dog skull dates back 33,000 years
If you think a Chihuahua doesn't have much in common with a Rottweiler, you might be on to something.
Other Sciences / Archaeology & Fossils
Jan 23, 2012 |
4.7 / 5 (15) |
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Team finds natural reasons behind nitrogen-rich forests
(PhysOrg.com) -- Many tropical forests are extremely rich in nitrogen even when there are no farms or industries nearby, says Montana State University researcher Jack Brookshire.
Space & Earth / Earth Sciences
Jan 16, 2012 |
4.8 / 5 (6) |
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New technologies challenge old ideas about early hominid diets
New assessments by researchers using the latest high-tech tools to study the diets of early hominids are challenging long-held assumptions about what our ancestors ate, says a study by the University of Colorado ...
Other Sciences / Archaeology & Fossils
Oct 13, 2011 |
5 / 5 (3) |
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Global warming: New study challenges carbon benchmark
The ability of forests, plants and soil to suck carbon dioxide (CO2) from the air has been under-estimated, according to a study on Wednesday that challenges a benchmark for calculating the greenhouse-gas ...
Space & Earth / Earth Sciences
Sep 28, 2011 |
4.4 / 5 (12) |
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