For those like me who had no idea - Denisovans diverged from the branch that became
Modern humans 600-744,000 years ago. https://en.m.wikipedia.org/wiki/Denisovan
https://en.wikipedia.org/wiki/Melanesia
> People from Melanesia may carry genetic evidence of a previously unknown extinct hominid species
https://phys.org/news/2016-11-people-melanesia-genetic-evide...
is likely a wrong description. We share around 90% of DNA with pigs, cucumber and what not (figures estimated, I'm not into Bio).