Polychlorinated biphenyls, or PCBs, have been banned in the United States since 1979, but a new study by researchers at Harvard’s T.H. Chan School of Public Health shows that up to 14 million students in 26,000 U.S. public schools may still be exposed to the toxic industrial chemicals. [1
Doctors may one day be able to test people for Alzheimer’s disease by testing their ability to identify familiar scents, like smoke, coffee, and raspberry.
In 2 studies released at an international Alzheimer’s meeting July 26, people who were in their 60s and older took a standard odor test. In both cases, individuals who did poorly on the tests were more likely to already have or go on to develop memory and thinking problems.
