New study challenges old views on what’s ‘primitive’ in mammalian reproduction
It was originally thought that marsupial reproduction was more primitive and that placentals were more evolutionarily advanced. Researchers at UW now assert that placentals actually came first.
An injured koala is treated at the Kangaroo Island Wildlife Park, at the Wildlife Emergency Response Centre in Parndana, Kangaroo Island, Australia January 19, 2020.(photo credit: REUTERS/TRACEY NEARMY)ByJERUSALEM POST STAFFUpdated:
