The current body of evidence suggests that we could and did, since Neanderthal DNA is present in some modern humans [1].<p>[1] <a href="http:&#x2F;&#x2F;www.bbc.com&#x2F;news&#x2F;science-environment-33226416" rel="nofollow">http:&#x2F;&#x2F;www.bbc.com&#x2F;news&#x2F;science-environment-33226416</a>