Explore how we know.
Follow a trace through its context, its dates, and its competing explanations. Then change the question and see what still holds.
Evidence has a structure.
Navigate from a physical trace to its dated material, publications, and unresolved association.
02 / INVESTIGATEMake a provisional judgment.
Read the observations, propose a next test, then reveal the record’s limitation.
03 / CHANGE THE RECORDWhat if less survived?
Hide selected kinds of evidence and notice which questions become harder to answer.
04 / OPEN THE METHODSTake the evidence with you.
Download the graph, date constraints, citations, and cautious map locators.
Line style describes the kind of reasoning, not a probability or an endorsement. Strong versus moderate support requires a claim-specific review; it is not automatically assigned from a dating method.
Follow a larger question
Five guided journeys connect the records. Olorgesailie opens the procurement-versus-exchange question; Ust’-Ishim adds genomic evidence of ancestry. Neither permits a precise movement route by itself.
Where are the environmental and mobility simulations?
These need independently licensed, dated environmental grids and explicit model assumptions. This release provides a dataset integration plan. It does not yet calculate mobility, reconstruct habitats, or synthesize ancient soundscapes.