Neanderthals were extinct. Homo sapiens and Neanderthals lived together In the same period. Homo sapiens and Neanderthals than other types. But modern man's blood has mixed Neanderthal blood. It is the result of research. In other words, Homo sapiens and Neanderthals would have had an hybridization. However, there is nothing definite about the extinction of the Neanderthals. In the past, it was thought that Neanderthals are closer to beasts. But even Neanderthals had human habits. So there are these claims. It is a theory that Neandertal is one of the Homo sapiens.