 to help the mother look after the youngster. Previously, they say, all known cases of care by Neanderthals involved adult individuals, leading some scientists to believe that this behaviour was not genuine altruism, but merely an exchange of assistance between equals. Marion Strong reporting there. And you can get more on that story on the science pages of the BBC website. That's bbc.com forward slash news. But from the newsroom for now, that's it. Thanks for listening. Goodbye.