Eudoxus of Cnidus

Circa 10,835 BC the cataclysmic Younger-Dryas impact event appears to have contributed to the demise of human cultures and many megafaunal species across several continents, although more research is needed to confirm these effects. However, the global evidence of the Younger Dryas impact event, is overwhelming and mainly in the form of geochemical debris, such as nano-diamonds, platinum laden dust and quench-melted impact ejecta, which is scattered in a thin layer over nearly half the world’s land surface.