Was Neanderthal-Homosopiens mating possible?

 Does modern "Homo sapiens" have the gene of "Neanderthals"? In other words, are modern people hybridized with Neanderthals who lived 250,000 to 25,000 years ago and then disappeared? At the "Neanderthal Symposium" recently held by New York University in the United States, scholars had a heated debate over the questions that have continued since the discovery of Neanderthal fossils in the Neander Valley in Germany in 1856. The question was whether Homo sapiens and Neanderthals, two primates that shared similar characteristics, had crossbreeding. According to the traditional definition, life is born only by hybridization within the same species, and the second generation born by crossbreeding has no reproductive ability. A typical example is a mule born by crossbreeding between a mare and a male donkey. So are Homo sapiens and Neanderthals completely different species? Participants at the meeting concluded that "neanderthals and homo sapiens are completely separate species in evolutionary and anatomical terms." However, opinions were divided on whether it was a biologically independent species. Dr. Chris Stringer, a paleontologist at the London Museum of Natural History, who leads the theory that modern human ancestors moved from Africa to Europe 150,000 years ago and drove out remaining primitive human beings, argued that hybridization can occur. On the other hand, Dr. Mark Stoneking of the Max Planck Institute of Evolutionary Anthropology in Germany said, "An analysis of genetic patterns of modern humans and DNA collected from fossils of Neanderthals and early modern humans showed no evidence of interbreeding between the two species." Dr. David Ser of McGill University in Montreal concluded that "the two are biologically different species," based on an analysis of mitochondrial DNA extracted from fossils of 24 Neanderthals and 40 early modern humans. "Neanderthal genes did not contribute significantly to Homo sapiens. The contribution should have been less than one percent." Some scholars said Neanderthals and modern humans did not mate because of the huge time gap between the two species in continental Europe as well as the difference between species.