Blood from a Bison found on an agate scraper dated thousands of years old. Blood is not expected to be preserved for that long much less for millions of years and yet blood tissue has been discovered in dinosaur fossils dated to be millions of years old. [Such preservation can only be possible by way of rapid deposition and burial.] https://www.usatoday.com/story/news/nation/2023/07/11/oregon-may-be-home-to-oldest-human-occupied-site-in-north-america/70400354007/?gnt-cfr=1