Scientists find impact of open-ocean industrial fishing within centuries of bird bones
Fossil shells and new geochemical technique provide clues to ancient climate cooling
Using a new laboratory technique to analyze fossil snail shells, scientists have gained insights into an abrupt climate shift that transformed the planet nearly 34 million years ago.
Apr 22, 2013
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Curiosity rover finds clues to changes in Mars' atmosphere
(Phys.org)—NASA's car-sized rover, Curiosity, has taken significant steps toward understanding how Mars may have lost much of its original atmosphere.
Nov 02, 2012
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Oxygen's ups and downs in the early atmosphere and ocean
Most researchers imagine the initial oxygenation of the ocean and atmosphere to have been something like a staircase, but with steps only going up. The first step, so the story goes, occurred around 2.4 billion ...
Oct 23, 2012
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White shark diets vary with age and among individuals
White sharks, the largest predatory sharks in the ocean, are thought of as apex predators that feed primarily on seals and sea lions. But a new study by researchers at the University of California, Santa ...
Sep 28, 2012
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Tasting carbon with WAFT'ed light: New instrument analyzes tiny samples at low pressure and temperature
(Phys.org) -- When delving into the nuances of carbon dioxide, a new instrument designed by scientists at Pacific Northwest National Laboratory "sips" the sample and reveals information about the source of ...
Apr 09, 2012
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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 ...
Oct 13, 2011
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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 ...
Jul 22, 2011
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Discovering lost salmon at sea
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 ...
May 10, 2011
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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 ...
Nov 10, 2010
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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 ...
Apr 27, 2010
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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 ...
Feb 10, 2010
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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, ...
Nov 23, 2009
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New isotope cluster could lead to better understanding of atmospheric carbon dioxide
(PhysOrg.com) -- A team of researchers has discovered an unexpected concentration of a certain isotopic molecule in parts of the stratosphere that could have implications for understanding the carbon cycle ...
Jul 14, 2009
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