An article published in the journal “Cell” describes a genetic research that focuses on the interbreeding between Homo Sapiens and Denisovans, a species of hominins known only thanks to a few bones that were preserved in conditions good enough to extract their DNA. A team of scientists at the University of Washington in Seattle compared the DNA of the Denisovans available with those of many modern humans from various different populations, concluding that there were at least two cases of interbreeding between the two species.