All Articles Tagged As: mammals
 | Brown bears from the Iberian Peninsula are not as genetically different from other brown bears in Europe as was previously thought. A new study shows that, on the contrary, the Spanish bear was only recently isolated from other European strains. These findings shed new light on the discussion of how to save the population of Spanish bears. ...> Full Article |
 | The Fertile Crescent of the Middle East has long been identified as a "cradle of civilization" for humans. In a new genetic study, researchers at the University of California, Davis, have concluded that all ancestral roads for the modern day domestic cat also lead back to the same locale. ...> Full Article |
 | Researchers from the University of Sheffield, as part of an international team, have discovered the secret of why dark sheep on a remote Scottish Island are mysteriously declining, seemingly contradicting Darwin's evolutionary theory. ...> Full Article |
 | Human evolution has created enhancements in key genes connected to the p53 regulatory network -- the so-called guardian of the genome -- by creating additional safeguards in human genes to boost the network's ability to guard against DNA damage that could cause cancer or a variety of genetic diseases, an international team of scientists led by Cincinnati Children's Hospital Medical Center writes in the Jan. 22 Proceedings of the National Academy of Sciences. Because genetically engineered mouse models are increasingly powerful tools in understanding the risks and mechanisms of human diseases -- and rodents do not have the same evolution-based safeguards in p53 function as humans -- the study also underscores the need for additional considerations in the interpretation of research using rodent models. ...> Full Article |
 | When young mice leave their mothers' homes, they choose to live in places much like the ones where they were raised, according to research done at UC Davis. ...> Full Article |
 | Locks of hair from more than 400 grizzly bears are stored at Montana State University, waiting to tell the tale of genetic diversity in the Yellowstone Ecosystem. ...> Full Article |
 | Fruit fly genomes provide window to genome function, clues for mammal studies ...> Full Article |
 | A theory explaining the evolution of giant rodents, miniature elephants, and even miniature humans on islands has been called into question by new research ...> Full Article |
 | Genetic work has found that the UK's population of greater horseshoe bats originated from west Asia around 40,000 to 60,000 years ago. ...> Full Article |
 | When it comes to the FOXP2 gene, humans have had most to shout about. Discoveries that mutations in this gene lead to speech defects and that the gene underwent changes around the time language evolved both implicate FOXP2 in the evolution of human language. ...> Full Article |
 | A fossilized whale skeleton excavated 20 years ago amid the stench and noise of a seabird and elephant seal rookery on California's Año Nuevo Island turns out to be the youngest example on the Pacific coast of a fossil whale fall and the first in California, according to paleontologists. ...> Full Article |
 | Widespread starvation in species suggests problems in food chain ...> Full Article |
 | Behind the sailor's lore of fearsome battles between sperm whale and giant squid lies a deep question of evolution: How did these leviathans develop the underwater sonar needed to chase and catch squid in the inky depths? ...> Full Article |
 | Ancient DNA harvested from pigs has allowed scientists, for the first time, to accurately determine the arrival of early farmers into Europe 11,000 years ago during the latter part of the Stone Age. ...> Full Article |
 | Biologists at Harvard University and the University of California, San Diego, have found that a simple interaction between just two genes determines the patterns of fur coloration that camouflage mice against their background, protecting them from many predators. The work, published recently in the journal PLoS Biology, marks one of the few instances in which specific genetic changes have been linked to an organism's ability to survive in the wild. ...> Full Article |
 | Transcription - the transfer of DNA's genetic information through the synthesis of complementary molecules of messenger RNA - forms the basis of all cellular activities. Yet little is known about the dynamics of the process - how efficient it is or how long it takes. Now, researchers at the Albert Einstein College of Medicine of Yeshiva University have measured the stages of transcription in real time. Their unexpected and surprising findings have fundamentally changed the way transcription is understood. ...> Full Article |
 | Nectar-feeding bats burn sugar faster than any other mammal on Earth - and three times faster than even top-class athletes - ecologists have discovered. ...> Full Article |
 | A 30-year scientific debate over how specialized cells in the inner ear amplify sound in mammals appears to have been settled more in favor of bouncing cell bodies rather than vibrating, hair-like cilia, according to investigators at St. Jude Children's Research Hospital. ...> Full Article |
 | The discovery of a 65-million-year-old fossil in Mongolia offers new evidence that mammals began to thrive only after the dinosaurs died off. ...> Full Article |
You may well ask the question, where did the animals and plants of modern day Ireland and Britain come from? Published in the journal, Proceedings of the Royal Society, scientists at Queen’s University Belfast have uncovered evidence that stoats survived in Ireland at the coldest point of the last Ice Age, 23,500 years ago.
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Despite great progress over the past decade, the evolutionary history of placental mammals remains controversial. While a consensus is emerging on the topology of the evolutionary tree, although with occasional disagreement, divergence times remain uncertain. The age of earlier nodes and in particular the root, remain especially uncertain in the absence of definitive placental fossils deeper into the Cretaceous.
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Scientists have long thought that the mass extinction of the dinosaurs around 65 millions years ago opened the door for modern mammal species to proliferate. But an international team of scientists has created a mammoth record of evolutionary timing, showing that the origins and diversification of existing mammal species - including human ancestors - don’t synch with the demise of the dinosaurs.
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