The mice of "Jugs"

Mad scientists grow human breasts on mice. They're doing this for cancer research, but I just can't get the thought of big-hootered mice out of my head now.
Unlike human breasts, however, the mice's growths sit flush to the chest. Humans are unusual in this respect, says Daniel Medina who studies breast cancer at Baylor College of Medicine at Houston, Texas: "In few other species are breasts pendulous."