Mice really do like to run in wheels
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/05/wt_Figure201B_free.jpg?fit=860%2C460&ssl=1)
Scientists put a cagelike structure in a green urban area with a running wheel inside. A camera captured wild mice, shrews and other animals running on the wheel.
© 2014 Johanna H. Meijer and Yuri Robbers; Proc. Royal Soc. B 2014