HumansChild tooth is fourth fossil clue to mysterious Denisovan humans Genetic analysis shows a tooth from the Denisova cave in Siberia is only the fourth specimen from elusive early humans who lived alongside Neanderthals 51¶¯Âþ
HealthSuper-you: The mutant powers you get from outsider genesGenes from other species, and cells from your relatives, live inside your body – and they hint at how we can improve ourselvesFeatures