News tagged with mitochondrial
New study suggests polar bears evolved earlier than previously thought
(Phys.org) -- A new genetic analysis carried out by and international team of scientists has revealed that polar bears and brown bears may have diverged around 600,000 years ago, which is much earlier than ...
Apr 20, 2012 |
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What, or who, killed the last mammoths?
The last known population of woolly mammoths, roaming a remote Arctic island long after humans invented writing, were wiped out quickly, reports a study released Wednesday.
Mar 31, 2010 |
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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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Australia discovered by the 'Southern Route'
Genetic research indicates that Australian Aborigines initially arrived via south Asia. Researchers writing in the open access journal BMC Evolutionary Biology have found telltale mutations in modern-day Indian populations that a ...
Jul 21, 2009 |
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'Great speciators' explained: It's intrinsic
New molecular research shows that birds within the family Zosteropidae—named white eyes for the feathers that frame their eyes—form new species at a faster rate than any other known bird. Remarkably, unlike ...
Biology /
Jan 26, 2009 |
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Forensic science used to determine who's who in pre-Columbian Peru
Analysis of ancient mitochondrial DNA (mtDNA) has been used to establish migration and population patterns for American indigenous cultures during the time before Christopher Columbus sailed to the Americas. ...
Apr 23, 2012 |
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Genetic study unravels ancient links between African and European populations
Large numbers of people moved between Africa and Europe during recent and well-documented time periods such as the Roman Empire, the Arab conquest, and the slave trade, and genetic evidence of these migrations lives on in ...
Mar 26, 2012 |
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The Viking journey of mice and men
House mice (Mus musculus) happily live wherever there are humans. When populations of humans migrate the mice often travel with them. New research published in BioMed Central's open access journal BMC Evolutionary Biology h ...
Mar 19, 2012 |
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High-energy lifestyles led to evolution of the sexes
Scientists are a step closer to explaining one of the most enduring mysteries of modern biology; why are there males and females?
Dec 19, 2011 |
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Endangered horse has ancient origins and high genetic diversity, new study finds
An endangered species of horse -- known as Przewalski's horse -- is much more distantly related to the domestic horse than researchers had previously hypothesized, reports a team of investigators led by Kateryna ...
Sep 07, 2011 |
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Ancestry of polar bears traced to Ireland
An international team of scientists has discovered that the female ancestor of all living polar bears was a brown bear that lived in the vicinity of present-day Britain and Ireland just prior to the peak of ...
Jul 07, 2011 |
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The body's power stations can affect aging
Mitochondria are the body's energy producers, the power stations inside our cells. Researchers at the University of Gothenburg, Sweden, have now identified a group of mitochondrial proteins, the absence of ...
May 10, 2011 |
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Researchers uncover new role for mitochondria during RNA processing
Michael Frohman, M.D., Ph.D., Chair of the Department of Pharmacological Sciences at Stony Brook University School of Medicine, and colleagues, have discovered a new role for mitochondria during ribonucleic acid (RNA) processing. ...
Mar 16, 2011 |
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Contagious cancer thrives in dogs by adopting host's genes
An curious contagious cancer, found in dogs, wolves and coyotes, can repair its own genetic mutations by adopting genes from its host animal, according to a new study in the journal Science.
Jan 20, 2011 |
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When less is more: How mitochondrial signals extend lifespan
In making your pro-longevity resolutions, like drinking more red wine and maintaining a vibrant social network, here's one you likely forgot: dialing down your mitochondria. It turns out that slowing the engines ...
Jan 06, 2011 |
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