Summer Series: Eclectic genetics, Voles losing chromosomes and endangered species cloning

Another January edition of Lost in Science Summer Series where we revisit some stories from the past year. On this weeks' show, Chris investigates some research involving sex chromosomes and how one species is adapting to losing the Y chromosome that makes males of the species male. And Claire explains the science behind a bold project to reinvigorate the gene pool of an endangered species using cloning techniques.