How Much Time Outdoors Do You Really Need?

A quick dose can do wonders for your well-being

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Back in 2008, a group of researchers at University of Michigan studied whether spending time in nature could improve a person’s cognitive performance. They tested the memory of 38 students, and then split them into two groups: one went for a 2.8-mile walk in an arboretum, while the other went for a 2.8-mile walk…