As the Danube River dries up, World War II shipwrecks and mammoth bones come into view CBS NewsThe Danube River's water is dropping so low that World War II ships are emerging apnews.comAncient mammoth remains and a Nazi shipwreck: Europe's shrinking rivers reveal past relics CNNSunken Nazi warships resurface as water levels drop ReutersSunken Nazi warships emerge from the Danube as water levels drop to record lows
