As scientists move closer to decoding the genome of woolly mammoths, some scientists are raising ethical concerns about the possibility of cloning extinct animals
As scientists move closer to decoding the genome of woolly mammoths, some scientists are raising ethical concerns about the possibility of cloning extinct animals. CBS News' Kera Rennert spoke with Dr. Ross MacPhee, the curator of the Department of Mammalogy at the American Museum of Natural History, about the controversy.
