In modern ecology, the removal or addition of a predator to an ecosystem can produce dramatic changes in the population of prey species. For the first time, scientists have observed the same dynamics in the fossil record, ...
Evolution
May 2, 2011
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(PhysOrg.com) -- After the biggest mass extinction in Earth's history -- 250 million years ago -- ocean algae and bacteria rebounded so fast that they consumed virtually all the oxygen in the sea, slowing the recovery of ...
Earth Sciences
Mar 25, 2011
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(PhysOrg.com) -- A new technique has allowed scientists to pin down the timing of ancient glaciations, linking them more firmly to two bursts of extinction.
Earth Sciences
Mar 8, 2011
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With the steep decline in populations of many animal species, from frogs and fish to tigers, some scientists have warned that Earth is on the brink of a mass extinction like those that occurred only five times before during ...
Ecology
Mar 2, 2011
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About 450 million years ago, Earth suffered the second-largest mass extinction in its history—the Late Ordovician mass extinction, during which more than 75 percent of marine species died. Exactly what caused this tremendous ...
Earth Sciences
Jan 27, 2011
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University of Alberta researchers determined that a fossilized dinosaur bone found in New Mexico confounds the long established paradigm that the age of dinosaurs ended between 65.5 and 66 million years ago.
Archaeology
Jan 27, 2011
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Charles Darwin's theory of gradual evolution is not supported by geological history, New York University Geologist Michael Rampino concludes in an essay in the journal Historical Biology. In fact, Rampino notes that a more ...
Evolution
Nov 9, 2010
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Spectacular species previously unknown to the outside world are being discovered in the Amazon rainforest at a rate of one every three days, environment group WWF said in a report published Tuesday.
Plants & Animals
Oct 26, 2010
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fossilized tracks -- is described this week in Proceedings of the Royal Society B. Just one or two million years after the massive Permian-Triassic extinction, an animal smaller than a house cat walked across fine mud in ...
Archaeology
Oct 6, 2010
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A mass extinction of fish 360 million years ago hit the reset button on Earth's life, setting the stage for modern vertebrate biodiversity, a new study reports.
Archaeology
May 17, 2010
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