Doubt of Interbreeding with Neanderthals

http://www.guardian.co.uk/science/2012/aug/14/study-doubt-human-neanderthal-interbreeding?INTCMP=SRCH

This is an interesting article that refutes the idea that our Homo sapiens interbred with Neanderthals. A few years ago, evidence was found that showed there was shared DNA between us and Neanderthals. Scientist at the University of Cambridge are saying that the shared DNA is not a result of interbreeding but is the DNA of our shared ancestor, Homo heidelbergensis.