It seems that modern humans have something like 2% of their DNA from Neanderthals – varying of course. What exactly does this mean. We share above 98% of our DNA with chimps and 50% with most plants. So what is the 2%. It can’t be over and above our relation to chimps as that would put us over 100%. Is it of the differences between us and our closest relatives, the chimps, 2% of that is common with Neanderthals? That doesn’t sound like enough actually.