sentences:  However, there are still less than a dozen frozen zoos worldwide.At the United Arab Emirates' Breeding Centre for Endangered Arabian Wildlife (BCEAW) in Sharjah, the embryos stored include the extremely endangered Gordon’s wildcat ("Felis silvestris gordoni") and the Arabian leopard ("Panthera pardus nimr") (of which there are only 50 in the wild).The Audubon Center for Research of Endangered Species, affiliated with the University of New Orleans, is maintaining a frozen zoo.