There has been a lot of discussion about the time when humans first arrived in the Americas, and also which way they took. 15,000 years ago? 20,000 years ago? 40,000 years ago, and with more immigration waves later? Along the coasts? Through the interior? Or even via the open Pacific? https://www.nature.com/nature/journal/v544/n7651/full/nature22065.html [Broken], published in Nature, offers a completely new time frame. The authors found evidence for human activities in California 130,000 years ago: Mammoth bones that have been broken shortly after the animal died, probably with stone tools. The bones could be dated: 130.7 ± 9.4 thousand years old. Stones that seem to belong to hammer and anvil combinations, with signs of use. No human bones were found, so the evidence relies on the interpretation of the tool marks on the bones and the stones found. If it can be confirmed, it means humans arrived in the Americas way earlier than previously thought. Even if humans were there 130,000 years ago, it does not imply they have been there all the time, or in large numbers. There are many remains from the last 15,000 years, but just one discovery that points to a much older human presence. Either they disappeared again, or at least they had a small population, otherwise we would have found many remains by now.