IT was an otherwise ordinary day in 2015 when Viviane Slon had her eureka moment. As she worked at her computer, the results revealed the sample she was examining contained human DNA. There was nothing so unusual about that in itself: at the time, the ancient DNA (aDNA) revolution was in full swing, and surprising new insights about our ancestors were being gradually unveiled. But Slon’s sample wasn’t from human remains – it was just dirt from a cave floor. That immediately told her she was onto something big…
This article first appeared online in New Scientist on 31 December 2024. To continue reading, click here (paywall).