But a new study suggests that the rodents enjoy running and when wild mice come across an exercise wheel they do exactly the same thing voluntarily. A group of scientists set up wheels in the wild ...

Not only did wild house mice run on the wheel, but so did rats, shrews, frogs, slugs, and snails. “When I saw the first mice, I was extremely happy,” Meijer told The New York Times. “I had to laugh ...