Humans were present on the western side of the Bering land bridge at Siberia's Yana Rhinoceros Horn site as early as 25,000 BC.
Notes on verification
Confirmed by original 2004 Pitulko et al. Science paper and multiple independent peer-reviewed sources; radiocarbon date of 27,000 BP aligns with ~25,000 BC, though calibrated dates run somewhat older (~30,000-32,000 cal BP). [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=1.0 clusters=3 claim_tier=notable]
Sources
- Paleo-Indians - Students | Britannica Kids | Homework Help (seed:history_and_archaeology)
- https://pubmed.ncbi.nlm.nih.gov/14704419/ (corroboration)
- https://www.sciencedirect.com/science/article/abs/pii/S0277379118307716 (corroboration)
- https://www.journals.uchicago.edu/doi/full/10.1086/693388 (corroboration)