Rats can’t vomit. This may be a function of their anatomy—their stomachs are “not well structured for moving contents towards the esophagus” is how one study delicately put it—or it may have something ...

Just about every student of animal behavior has studied the work of Dr. John Calhoun, famously or infamously known for his rodent apartment complexes like “Mouse Universe 25,” which led to his concept ...

Rats are extremely playful creatures. They love playing chase, and they literally jump for joy when tickled. Central to this playfulness, a new study finds, are cells in a specific region of rats’ ...