 It was a piece of a mammoth skin that was, you know, woolly, true to the name. That specimen enabled the team to reconstruct the three-dimensional structure of all 28 of the mammoth's chromosomes. So we were able to assemble the genome of a woolly mammoth, just as 25 years ago, humans were excited for the first time to assemble our own genomes. Well, now we can do that for animals that are long extinct. And so that's obviously a milestone.