Biological clock more influenced by temperature than light

Photo by David Kilper/WUSTL PhotoErik Herzog, Ph.D., and graduate student Rachel Huckfeldt attach electrodes to a multielectrode array.Getting over jet lag may be as simple as changing the temperature —your brain temperature, that is. That’s a theory proposed by Erik Herzog, Ph.D. assistant professor of biology in Arts & Sciences at Washington University in St. Louis. Herzog has found that the biological clocks of rats and mice respond directly to temperature changes.

Biologists find unexpected rapid evolution in Caribbean lizards

Photo by David Kilper/WUSTL PhotoGrendel is a Solomon Islands Prehensile Tailed Skink.Biologists at Washington University in St. Louis have documented unprecedented levels of speciation and diversification in Caribbean anolis lizards. The discovery is completely unexpected and challenges the way evolutionary biologists think of evolution.

Theory can help disable terrorists’ messages

O’SullivanAn electrical engineer at Washington University in St. Louis has devised a theory that sets the limits for the amount of data that can be hidden in a system and then provides guidelines for how to store data and decode it. Contrarily, the theory also provides guidelines for how an adversary would disrupt the hidden information. The theory will have a major impact on homeland security applications.

Evolutionary biologist: race in humans a social, not biological, concept

TempletonThe notion of race in humans is completely a social concept without any biological basis, according to a biologist at Washington University in St. Louis. There are not enough genetic differences between groups of people to say that there are sub-lineages (races) of humans, said Alan R. Templeton, Ph.D., professor of biology in Arts & Sciences at Washington University in St. Louis. On the other hand, there are different races in many other species, including chimpanzees, our closest evolutionary relatives. Templeton was part of a recent St. Louis panel discussion that previewed the first episode of the National Public Television’s “Race: The Power of an Allusion” series running nationally on May 4, 11, and 18 (check local stations for times).
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