12 Prehistoric Civilizations Wiped Out by Something That Wasn't Human

12 Prehistoric Civilizations Wiped Out by Something That Wasn't Human In 2003, a glaciologist named Dr. Erik Solheim of the University of Bergen was cross-referencing sediment cores from a fjord-adjacent valley in what is now northern Scotland when he found a stratified silt deposit that didn't match any known flood event in the region's geological record. The layer was too thick, too sudden, and too uniform to have come from an ordinary river surge. It had the signature of a wall of water arriving all at once, from somewhere that shouldn't have had that much water to give.