‘Climate windows’ allowed the first human migrations

New modelling reveals when conditions were favourable for ancient humans to leave Africa.

A series of six maps showing the north east corner of Africa and where rain fell during different millennia
Environmental conditions on the Arabian peninsula. Maps (A)–(E) illustrate precipitation conditions at different points in time. Blue cells represent areas suited for expansions, or climatic refugia during harsh periods, whereas red cells with were likely unsuitable for human persistence. Credit: Beyer et al, 2021
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