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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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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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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Big freeze plunged Europe into ice age in months
In the film, 'The Day After Tomorrow' the world enters the icy grip of a new glacial period within the space of just a few weeks. Now new research shows that this scenario may not be so far from the truth after all.
Space & Earth / Earth Sciences
Nov 30, 2009 |
4.1 / 5 (18) |
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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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Physicists explain the long, useful lifetime of carbon-14
The long, slow decay of carbon-14 allows archaeologists to accurately date the relics of history back to 60,000 years.
May 26, 2011 |
4.8 / 5 (14) |
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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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The Carbon Cycle Before Humans
Geoengineering -- deliberate manipulation of the Earth's climate to slow or reverse global warming -- has gained a foothold in the climate change discussion. But before effective action can be taken, the Earth's ...
Space & Earth / Earth Sciences
Feb 16, 2010 |
3.1 / 5 (19) |
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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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Scientists link ocean acidification to prehistoric mass extinction
(PhysOrg.com) -- New evidence gleaned by analyzing calcium embedded in Chinese limestone suggests that volcanoes, which spewed massive amounts of carbon dioxide into the atmosphere for a million years, caused the biggest ...
Space & Earth / Earth Sciences
Apr 27, 2010 |
4.5 / 5 (13) |
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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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Giant fossil Prototaxites: Unraveling a 400-million-year-old mystery
Contradictions and puzzles surround the giant fossil Prototaxites. The fossils resemble tree trunks, and yet they are from a time before trees existed. The stable carbon isotope values are similar to those of fungi, but th ...
Other Sciences / Archaeology & Fossils
Feb 10, 2010 |
4 / 5 (10) |
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Fossil record receives new timeline
Beginning around 542 million years ago, a profusion of animals with shells and skeletons began to appear in the fossil record. So many life forms appeared during this time that it is often referred to as the ...
Space & Earth / Earth Sciences
Nov 10, 2010 |
4.3 / 5 (9) |
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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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