Wild Animals Caught Playing on Outdoor Hamster Wheel in Viral Dutch Study
Wild mice, rats, shrews, and even frogs voluntarily use running wheels in natural habitats without any food reward, according to a study published in the journal Proceedings of the Royal Society B. Researchers Johanna Meijer and Yuri Robbers from Leiden University installed 24-centimeter running wheels in a green urban area and a closed dune location, … Read more