Most Cave Art The Work Of Teens, Not Shamans
Fairbanks AL (SPX) Feb 13, 2006
Long accustomed to lifting mammoth bones from mudbanks and museum shelves and making sketches from cave art to gather details about Pleistocene animal anatomy, renowned paleobiologist and artist R. Dale Guthrie offers a fascinating and controversial interpretation of ancient cave art in his new book "The Nature of Paleolithic Art."
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New Analysis Shows Three Human Migrations Out Of Africa
St Louis MO (SPX) Feb 10, 2006
A new, more robust analysis of recently derived human gene trees by Alan R. Templeton, Ph.D, of Washington University in St Louis, shows three distinct major waves of human migration out of Africa instead of just two, and statistically refutes � strongly � the 'Out of Africa' replacement theory.
Blue Light May Fight Fatigue
Boston MA (SPX) Feb 06, 2006
Researchers from Brigham and Women's Hospital (BWH) and Harvard Medical School have found that exposure to short wavelength, or blue light, during the biological night directly and immediately improves alertness and performance. These findings are published in the February 1 issue of Sleep.
Brain Changes Significantly After Age Eighteen
Hanover NH (SPX) Feb 06, 2006
Two Dartmouth researchers are one step closer to defining exactly when human maturity sets in. In a study aimed at identifying how and when a person's brain reaches adulthood, the scientists have learned that, anatomically, significant changes in brain structure continue after age 18.
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Study Suggests Why Neanderthals Vanished
Boston (UPI) Jan 20, 2006
A multi-university study argues the disappearance of Neanderthals was not due to competition from modern humans, as is widely believed.
New Technique Puts Brain-Imaging Research On Its Head
St Louis MO (SPX) Dec 09, 2005
It's a scene football fans will see over and over during the bowl and NFL playoff seasons: a player, often the quarterback, being slammed to the ground and hitting the back of his head on the landing.
New Maps Reveal True Extent Of Human Footprint On Earth
San Francisco CA (SPX) Dec 06, 2005
As global populations swell, farmers are cultivating more and more land in a desperate bid to keep pace with the ever-intensifying needs of humans.
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Distinct Brain Regions Specialized For Faces And Bodies
Cambridge MA (SPX) Dec 01, 2005
Are you tempted to trade in last year's digital camera for a newer model with even more megapixels? Researchers who make images of the human brain have the same obsession with increasing their pixel count, which increases the sharpness (or "spatial resolution") of their images.
NSF Funds Probe Of The Quintessence Of Surprise
Los Angeles CA (SPX) Nov 29, 2005
We ignore some sudden noises, while others make us take action. We turn our eyes to look at some moving things - but not all. Why? A new theory and experimental evidence suggests a novel mathematical explanation of how brains measure "surprise" in a data stream--a theory that an NSF funded study will explore.
Imaging Technique Visualizes Effects Of Stress On Human Brain
Philadelphia, PA (SPX) Nov 24, 2005
The holiday season is notorious for the emotional stress it evokes. Researchers at the University of Pennsylvania School of Medicine have come up with a non-invasive way to see the effects of psychological stress in an area of the brain linked to anxiety and depression.
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New Study Posits Evolutionary Origins Of Two Distinct Types Of Laughter
Binghamton NY (SPX) Nov 23, 2005
In an important new study from the forthcoming Quarterly Review of Biology biologists from Binghamton University explore the evolution of two distinct types of laughter � laughter which is stimulus-driven and laughter which is self-generated and strategic.
One, Two, Threes not A, B, Cs
Moffett Field CA (SPX) Nov 09, 2005
Monkeys have a semantic perception of numbers that is like humans' and which is independent of language, Duke University cognitive neuroscientists have discovered. They said their findings demonstrate that the neural mechanism underlying numerical perception is evolutionarily primitive. Jessica Cantlon and Elizabeth Brannon described their findings with macaque monkeys in an article published online the week of Oct. 31, 2005, in the Early Edition of the Proceedings of the National Academies of Science.
California Scientists Double Volume Of Data In NIH Biotech Repository
San Diego CA (SPX) Oct 28, 2005
High-throughput sequencing of an individual's DNA yields a map of genetic variation which can give clues to the genetic underpinning of human disease. The current technologies collect genotypes, or information from the individual's two chromosomes.
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