By Meghan Rosen
Update, September 3, 2015: The study described in this article has been retracted. Amgen, the pharmaceutical company that employs scientists who coauthored the paper, requested the retraction after discovering that one of their scientists had manipulated experimental data.
The retraction notice, published September 1, notes that the paper’s coauthors from Washington State University and the University of Idaho are currently repeating portions of the study.
Grizzly bears have figured out how to be fat and fit.