Evie's owner said that the ragdoll meows at her from another room if she does not tend to her running wheel fast enough.

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 ...

Mice prefer wheels that have been made into irregular shapes, or include hurdles to jump over! This review proposes that wheel running may be an artefact of captive environments or of the ...