News tagged with evolutionary rate
Athletic frogs have faster-changing genomes
Physically fit frogs have faster-changing genomes, says a new study of poison frogs from Central and South America.
Apr 12, 2012 |
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Experiments explain why almost all multicellular organisms begin life as a single cell
Any multicellular animal, from a blue whale to a human being, poses a special difficulty for the theory of evolution. Most of the cells in its body will die without reproducing, and only a privileged few will ...
Dec 15, 2011 |
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Herbivore populations will go down as temperatures go up, study says
As climate change causes temperatures to rise, the number of herbivores will decrease, affecting the human food supply, according to new research from the University of Toronto.
Oct 04, 2011 |
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When plants go polyploid
(PhysOrg.com) -- Plant lineages with multiple copies of their genetic information face higher extinction rates than their relatives, researchers report in Science magazine.
Sep 13, 2011 |
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Southern Rocky Mountain pikas holding their own, assessment says
American pikas, the chirpy, potato-sized denizens of rocky debris in mountain ranges and high plateaus in western North America, are holding their own in the Southern Rocky Mountains, says a new University ...
Sep 01, 2011 |
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Crickets that live fast die young
Male crickets advertise their attractiveness with a loud and clear call to females. Calling effort has been linked to more mating success, but what are the hidden costs of showing off?
May 26, 2011 |
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Species extinction rates have been overreported, new study claims
The most widely used methods for calculating species extinction rates are "fundamentally flawed" and overestimate extinction rates by as much as 160 percent, life scientists report May 19 in the journal Nature.
May 18, 2011 |
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Ancient penguin DNA raises doubts about accuracy of genetic dating techniques
Penguins that died 44,000 years ago in Antarctica have provided extraordinary frozen DNA samples that challenge the accuracy of traditional genetic aging measurements, and suggest those approaches have been ...
Nov 10, 2009 |
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High mortality rates may explain small body size
A new study suggests that high mortality rates in small-bodied people, commonly known as pygmies, may be part of the reason for their small stature. The study, by Jay Stock and Andrea Migliano, both of the University of Cambridge, ...
Oct 05, 2009 |
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Census of modern organisms reveals echo of ancient mass extinction
Paleontologists can still hear the echo of the death knell that drove the dinosaurs and many other organisms to extinction following an asteroid collision at the end of the Cretaceous Period 65 million years ...
Other Sciences / Archaeology & Fossils
Feb 05, 2009 |
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