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Science News for July 13, 2001


Earthquakes reveal diamonds' origins

By analyzing seismic waves, scientists have mapped the physical properties of the earth below, identifying regions with seismically fast mantle that produce gem-quality diamonds. This discovery could aid in locating new diamond mines by targeting areas with similar characteristics.

SourceArizona State University·JournalGeophysical Research Letters·DateJul 13, 2001

Mother's drug use increases risks for male offspring

A study published by researchers at the University of Chicago Medical Center found that prenatal exposure to methamphetamine increases the risk of brain disorders, such as Parkinson's disease, in male offspring who later take the drug themselves. The toxic effects of methamphetamine can hasten the onset of these conditions.

SourceUniversity of Chicago Medical Center·JournalJournal of Pharmacology and Experimental Therapeutics·DateJul 13, 2001

Researchers discover how immune system rids nervous system of mosquito-borne viruses

Scientists at Johns Hopkins Bloomberg School of Public Health have identified a protein that clears viruses from neurons in the spinal cord and brain stem but not those in the cerebral cortex. The study suggests that different combinations of antibody and T-cell immunity may be needed to control infection and recovery from encephalitis.