But their techniques are also useful for old human remains, or even pre-human remains. And so it might inform archeology and anthropology. So for example, an archeologist might unearth this Neanderthal skull. They will use some science in order to figure out when did this skull enter into the ground? They might use a technique like radiocarbon dating. Radiocarbon dating. Which could be used for things up to around 50,000 years old.