Courtesy of Katherine Tweed

Katherine Tweed is a freelance writer based in New York City. She holds a master’s in science, health and environmental reporting from New York University. She is the editor for AOL's That's Fit. Katherine also writes about this trio of topics for a variety of other publications including Scientific American, Audubon Magazine and FoxNews. When she’s not tethered to her computer, Katherine is playing tennis, jogging or shopping at a farmer’s market.