Addiction genes inserted into humans’ ‘dark DNA’ by ancient viruses, study finds

Addiction genes inserted into humans’ ‘dark DNA’ by ancient viruses, study finds: Human genome 'littered' with viral DNA but problem drug users three times more likely to carry genetic fragments in regions which control reward centres and addictive behaviourDNA implanted in the “dark parts” of the human genome by ancient virus infections may help to explain why some people are more susceptible to drug addiction, a study suggests.Researchers from Oxford University and the University of Athens found changes in parts of the DNA which are...