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At 79, Ed Vilade has a jammed social calendar. Between his choir practice (he’s in two), voice lessons, community theater and overseeing the writer’s guild at his Silver Spring, Md., retirement community, Vilade’s brain was getting a regular workout, critical, he thought, to staying sharp as he aged.

But what wasn’t in shape was his body. So, three years ago, Vilade joined a clinical trial at the University of Maryland’s Exercise for Brain Lab, which used MRI and other diagnostic tools to study how physical exertion affects the neural networks that control memory and cognition.

Even on the roof of the world, climate change is melting the snow. The loss of a third of the ice of Himalayan mountains in the past 30 years has translated into water and food shortages and variable water quality in the villages below.

A University of Maryland team traveled there this month to see how communities there are tackling these insecurities and to apply its expertise in water sampling and analysis to inform solutions to citizens in Namobuddha Municipality.