10/09/2008

Scientists uncover miscalculation in geological undersea record

The precise timing of the origin of life on Earth and the changes in life during the past 4.5 billion years has been a subject of great controversy for the past century. The principal indicator of the amount of organic carbon ...

DNA 'tattoos' link adult, daughter stem cells in planarians

Unlike some parents, adult stem cells don't seem to mind when their daughters get a tattoo. In fact, they're willing to pass them along. Using the molecular equivalent of a tattoo on DNA that adult stem cells (ASC) pass to ...

Report reveals communication needs, recreation use during fires

The effectiveness of the media to inform the public during evacuations and wildland fire effects on recreation are some topics addressed in a U.S. Forest Service report published this month that is a compilation of 17 studies ...

Troubled kids hurt classmates' test scores, behavior

Troubled children hurt their classmates' math and reading scores and worsen their behavior, according to new research by economists at the University of California, Davis, and University of Pittsburgh.

Maxwell's demons may drive some biological systems

(PhysOrg.com) -- According to the second law of thermodynamics, entropy always increases. For example, two bodies of different temperatures, when brought into contact, will eventually mix together to result in a uniform temperature. ...

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