The Irish are descended from early Middle East farmers and from bronze metalworkers on the steppes around the Black Sea, scientists have found.
Genome sequencing and DNA analysis of the remains of people living 5000 years ago in what is now Ireland uncovered the origins of its population.
By sequencing the first genomes from Irish people of different eras, scientists found unequivocal evidence of mass migration into Ireland.
These genetic influxes brought cultural change such as moving to settled farmsteads, bronze metalworking - and may have been the origin of western Celtic language.
Geneticists from Trinity College, Dublin, and archaeologists from Queen's University Belfast studied the genome of a woman farmer who lived 5200 years ago near what is now Belfast.