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Early Primate Had Transitional Lemur-Like Grooming Claw
January 10, 2012 — A new study examines the first extinct North American primate with a toe bone showing features associated with the presence of both nails and a grooming claw, indicating our primate ancestors may ... > full story -
Molecular 'Culprit' in Rise of Planetary Oxygen
January 10, 2012 — A turning point in the history of life occurred two to three billion years ago with the unprecedented appearance and dramatic rise of molecular oxygen. Now researchers report they have identified an ... > full story -
Simpler Times: Did an Earlier Genetic Molecule Predate DNA and RNA?
January 9, 2012 — Scientists have described the Darwinian evolution of functional TNA molecules from a large pool of random sequences. This is the first case where such methods have been applied to molecules other ... > full story -
Evolution of Complexity Recreated Using 'Molecular Time Travel'
January 8, 2012 — Scientists have now demonstrated how just a few small, high-probability mutations increased the complexity of a molecular machine more than 800 million years ago. By biochemically resurrecting ... > full story -
Prehistoric Predators With Supersized Teeth Had Beefier Arm Bones
January 4, 2012 — The toothiest prehistoric predators also had beefier arm bones, according to results of a new study. Saber-toothed tigers may come to mind, but these extinct cats weren't the only animals with ... > full story -
The Bechstein's Bat, More Mediterranean Than Thought
January 4, 2012 — The Bechstein’s bat or Myotis bechsteinii lives in deciduous forests. It used to be very common in the Holocene era, but today there are only a few dispersed groups, despite the fact that a ... > full story -
New Theory Emerges for Where Some Fish Became Four-Limbed Creatures
December 27, 2011 — A small fish crawling on stumpy limbs from a shrinking desert pond is an icon of can-do spirit, emblematic of a leading theory for the evolutionary transition between fish and amphibians. This ... > full story -
Over 65 Million Years, North American Mammal Evolution Has Tracked With Climate Change
December 27, 2011 — Climate changes profoundly influenced the rise and fall of six distinct, successive waves of mammal species diversity in North America over the last 65 million years, shows a novel statistical ... > full story -
Bacteria's Move from Sea to Land May Have Occurred Much Later Than Thought
December 22, 2011 — A new analysis indicates the shift of soil bacteria Azospirillum may have occurred only 400 million years ago, rather than approximately two billion years earlier as originally ... > full story -
Genetic Study of Black Chickens Shed Light on Mechanisms Causing Rapid Evolution in Domestic Animals
December 22, 2011 — The genetic changes underlying the evolution of new species are still poorly understood. For instance, we know little about critical changes that have happened during human evolution. Genetic studies ... > full story -
Cultural Diversification Also Drives Human Evolution
December 22, 2011 — Changes in social structure and cultural practices can also contribute to human evolution, according to a new ... > full story -
Chinese Fossils Shed Light on Evolutionary Origin of Animals from Single-Cell Ancestors
December 22, 2011 — Evidence of the single-celled ancestors of animals, dating from the interval in the Earth's history just before multicellular animals appeared, has been discovered in 570 million-year-old rocks from ... > full story
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