When the horses and competitors go through their paces at the Summer Olympics in Hong Kong in 2008, it will be very hot and very humid – just as it is every summer there. Three special blankets will offer the Swiss teams’ tournament horses some respite from the elements.
University of Queensland researchers have traced the origins of one of the most important steps in animal evolution – the development of nerves.
The impact of global warming in the Arctic may differ from the predictions of computer models of the region, according to a pair of Penn State biologists. The team — which includes Eric Post, a Penn State associate professor of biology, and Christian Pederson, a Penn State graduate student — has shown that grazing animals will play a key role in reducing the anticipated expansion of shrub growth in the region, thus limiting their predicted and beneficial carbon-absorbing effect.
ust one night without sleep can increase the amount of the chemical dopamine in the human brain, according to new imaging research in the August 20 issue of The Journal of Neuroscience. Because drugs that increase dopamine, like amphetamines, promote wakefulness, the findings offer a potential mechanism explaining how the brain helps people stay awake despite the urge to sleep.