{"fact":"Crows originated in the Palaearctic region during the Miocene epoch, approximately 17.5 million years ago.","context":"Our BEAST dating analysis supports a mid-Miocene origin of Corvus dating to around 17.5 Mya (age within 95% HPD confidence intervals = 14.05–21.19 My).","source":"Knud A Jønsson; Pierre-Henri Fabre; Martin Irestedt, Brains, tools, innovation and biogeography in crows and ravens, 10.1186/1471-2148-12-72","index":239}