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## Reading the Iceman, Thirty Years Later
When Helmut and Erika Simon climbed down into that glacial gully in September 1991 and found what they thought was a recently dead mountaineer, they could not have imagined what they had found.
A man five thousand years old, preserved down to his last meals and his tattoos and the blood on his equipment. A murder victim whose death remains technically unsolved. A person whose genome has been sequenced twice, whose bacteria have been genotyped and traced across continents, whose clothing has been dissected by species and stitching technique, whose bone and tooth have been analyzed for the isotopic signature of the valleys where he grew and moved.
The 2023 genomic reanalysis represented the most comprehensive revision of the Ötzi picture since the 2001 arrowhead discovery. It did not change who he was — a Copper Age man, an Alpine farmer, a person of some status in a small community, the victim of a targeted killing — but it changed the resolution of that picture. The contamination-driven artifact of steppe ancestry is gone. The Anatolian farmer ancestry is higher and more precisely estimated. The skin was darker; the hair was likely sparser than depicted; the metabolic profile reflects the first farming populations adapting to grain-based diets.
Each revision is not a correction of a failure but a product of improvement. The ancient DNA field has gone from sequencing no ancient human genome to tens of thousands in roughly fifteen years. The methods for controlling contamination, for estimating ancestry components, for inferring phenotype from ancient variants have all improved substantially. The Ötzi genome that existed in 2012 and the Ötzi genome that exists in 2023 are both real scientific achievements; the second is simply better.