Would appreciate a reference to the 200-250,000 year old sites.
No not Calico, not in US. It was another site, maybe, in Mexico. The woman who found the site was hounded and eventually banned, I think, from ever going there again. Site exploration is now forbidden by the authorities. I think there was a mini-documentary either on TV or YouTube about the entire sad affair.
There was a particular local well-connected professor who did much to discredit her and her finds. There were too many people in the US whose ox would be severely gored were she correct. She had to leave the country without the bones she found, but trustingly gave them to the same local professor, who promptly lost them. There were casts made so all was not lost.
That’s most of what I remember.