An Aeon article has a decent recap of the state of research on human dispersals out of Africa and archaic hominins. Nothing in its is new to longtime readers of this blog, so I won't add anything here, but it is a good, reasonably up to date starting place to get grounded for readers who are more new to this area of research.
Now reading Pre-history of Australia, Mulvaney, p.184 1km Darwin Crater from meteorite strike at Andrew River site ~700ka, ejected impactites of glass up to 4cm used by locals for cutting.
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