Then can we have a swab of ear wax? Turns out scientists need a piece of DNA from the present-day ancestors of Cristopher Columbus in order to determine his true origins. Does he hail from Genoa? Could he be Portugeuse? Basque? Scientists are already busy at work trying to confirm whether it his bones that rest in a 500-year-old grave in Seville, Spain. But the big mystery is his home town. So far, 16 Colombos from Italy have come forward, in the name of science.