Neanderthal DNA in humans found to control smoking patterns
A genetic study on Neanderthals has revealed that present-day humans carry about 1.8-2.6% DNA from the ancestral species. Widespread interbreeding during that time led to disorders which evolved to affect mood, sleeping patterns, and even smoking status. The findings, based on a 52,000-year-old fossil found in Croatia, suggests Neanderthals lived in isolated populations of about 3,000 individuals.