Neanderthal love: Scientists split over how much mating occurred

"Is it bestiality? The debate over modern-human/Neanderthal interbreeding is part quest to chart the origins of the human race, part academic feud over old bones, and part family soap opera: Did some of our ancestors go to bed with creatures commonly thought of as less than human?" (Via The Anomalist.)

This reminds me of a certain Robert J. Sawyer novel I've been wanting to read.