A stingray in a small aquarium in Hendersonville, N.C., has become pregnant-despite living in a tank without a male ray. This seemingly miraculous event has stirred up online speculation that the expecting stingray, Charlotte, may have been impregnated by one of the small sharks that share her tank at the Aquarium & Shark Lab. But experts say that’s extraordinarily unlikely, on par with suggesting that a lion and a wolf could have baby “li-wolves” (“wolvions”?).