SilasMortimer writes "Researchers at the University of Colorado at Boulder have accomplished that for which humankind has been desperate for untold millenia: turning sad, injured regular mice into angry, beefed-up super-mice. Well, okay, there's no official word in TFA on the rodents' emotional states, but certainly when stem cells were injected into mice with leg injuries, the muscle grew back... almost twice as big as it was before the injury. This has many exciting implications, from better healing for injuries, to slowing down the aging process, to a spike in the number of cases of Generalized Anxiety Disorder among cats. I, for one, refuse to perpetuate lame, outdated memes. (But feel free to make up for the lack.)"