News tagged with extinct organisms
Researchers map fish species at risk from dams
Dams are believed to be one of the biggest threats to freshwater organisms worldwide: They disrupt normal patterns of water and sediment flow, impede migration, and alter the character of spawning and feeding grounds. A shortage ...
May 10, 2012 |
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Biologists predict extinction for organisms with poor quality genes
Evolutionary biologists at the University of Toronto have found that individuals with low-quality genes may produce offspring with even more inferior chromosomes, possibly leading to the extinction of certain ...
Apr 16, 2012 |
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Explosive evolution need not follow mass extinctions, says study of ancient zooplankton
Following one of Earth's five greatest mass extinctions, tiny marine organisms called graptoloids did not begin to rapidly develop new physical traits until about 2 million years after competing species became ...
Feb 13, 2012 |
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First plants caused ice ages: research
New research reveals how the arrival of the first plants 470 million years ago triggered a series of ice ages. Led by the Universities of Exeter and Oxford, the study is published today (February 1, 2012) in Nature Geoscience.
Space & Earth / Earth Sciences
Feb 01, 2012 |
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Researchers document caterpillars that mimic one another for survival
(PhysOrg.com) -- In the world of insects, high risk of attack has led to the development of camouflage as a means for survival, especially in the larval stage. One caterpillar may look like a stick, while another disguises ...
Dec 15, 2011 |
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Timeline of a mass extinction: New evidence points to rapid collapse of Earth’s species 252 million years ago
Since the first organisms appeared on Earth approximately 3.8 billion years ago, life on the planet has had some close calls. In the last 500 million years, Earth has undergone five mass extinctions, including ...
Space & Earth / Earth Sciences
Nov 18, 2011 |
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Tough turtles survive cretaceous meteorite impact
(PhysOrg.com) -- New fossil localities from North Dakota and Montana have produced the remains of a turtle that survived the 65 million-year-old meteorite impact that wiped out the dinosaurs. The resulting ...
Other Sciences / Archaeology & Fossils
Jul 12, 2011 |
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Bacteria develop restraint for survival in a rock-paper-scissors community
It is a common perception that bigger, stronger, faster organisms have a distinct advantage for long-term survival when competing with other organisms in a given community.
Jun 20, 2011 |
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Researchers resurrect ancient enzymes to reveal conditions of early life on Earth
(PhysOrg.com) -- Scientists from Columbia University, Georgia Institute of Technology and the University of Granada have for the first time reconstructed active enzymes from four-billion-year-old extinct organisms. ...
Apr 12, 2011 |
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UN meeting on saving species opens in Japan
(AP) -- Delegates from more than 190 nations kicked off a U.N. conference Monday aimed at ensuring the survival of diverse species and ecosystems threatened by pollution, exploitation and habitat encroachment.
Oct 18, 2010 |
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Scientists upbeat about global biodiversity panel
More than 90 countries have approved the creation of a scientific panel on biodiversity, the dream of many scientists around the world.
Jun 13, 2010 |
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Bacteria expect the unexpected: Scientists observe the emergence of a new adaptation strategy
Organisms ensure the survival of their species by genetically adapting to the environment. If environmental conditions change too rapidly, the extinction of a species may be the consequence. A strategy to ...
Nov 04, 2009 |
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A new day dawned fast: Recovery from marine mass extinction happened much faster than thought
(PhysOrg.com) -- In 1979, Luis Alvarez and his collaborators stunned the world with their discovery that an asteroid impact 65 million years ago probably killed off the dinosaurs and much of the the world's ...
Space & Earth / Earth Sciences
Oct 02, 2009 |
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Study finds role for parasites in evolution of sex
What's so great about sex? From an evolutionary perspective, the answer is not as obvious as one might think. An article published in the July issue of the American Naturalist suggests that sex may have evolved in part a ...
Jul 06, 2009 |
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Mass Extinctions, Ancient Viruses May Hold Clues to Life’s Origins
(PhysOrg.com) -- Mass extinctions occur repeatedly, though irregularly, throughout Earth’s history, and occasionally these extinctions have been devastating to life on our planet - or have they? Extinction ...
Apr 03, 2009 |
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