NatureLab mice have grown tissue more usually confined to a bra - lumps of human breast. The growths should help researchers work out how cancer develops.
...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."
Hey scientists? What's the point of giving mice breasts if they don't stick out like boobies?
(And it's a rhetorical question, so don't point that second sentence of the article to me.)