My absolute favourite thread on the old forum was the Ooparts thread but unfortunately I cannot currently link to it. So let's start again.
For those not familiar with Ooparts, they are artifacts of historical, archealogical and paleontological significance found in an unusual context which call into question the conventional historical narrative.
Denisova Cave, Siberia
Graham Hancock has written about the Denisova Cave discoveries in his book 'America Before'