In this episode, we’ll hear about why you might want to be skeptical of raw water, with Gail Teitzel, Editor of Trends in Microbiology (00:00); how brain chemistry might change in mice as a result of social isolation, with David Anderson, Cell (07:45); and what’s unusual about neurons in people with severe obesity, with Dhruv Sareen, Cell Stem Cell (17:10). Then, stay tuned for our monthly news roundup, including using MRI to predict risk tolerance; rethinking what we know about genetics, sugar, and weight gain; and how the sweet potato arrived in Polynesia (26:13).