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Second Opinion

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Second Opinion

In Second Opinion, Susan Perry helps MinnPost readers make their way through the thicket of health happenings, trends, studies and research. Perry has written several health-related books, and her articles have appeared in a wide variety of publications, including Minnesota Monthly, The History Channel Magazine and Woman's Day. She is a former writer/editor for Time-Life Books and a former editor of Nutrition Action Healthletter, published by the Center for Science in the Public Interest.

Scarlett Johansson in a scene from the 2014 motion picture "Lucy."

We use only 10% of our brains? It's a myth

"The entire brain is active all the time. The brain is an organ. Its living neurons, and the cells that support them, are always doing something," writes Princeton's Sam McDougle.