Sinkhole rain. An analysis of a case of sinkhole formation under a retention pond due to a large amount of rain can be seen in a sinkhole collapse study. Sinkholes have been used for centuries as disposal sites for various forms of waste. A consequence of this is the pollution of groundwater resources, with serious health implications in such areas. The Maya civilization sometimes used sinkholes in the Yucatán Peninsula (known as cenotes) as places to deposit precious items and human sacrifices. When sinkholes are very deep or connected to caves, they may offer challenges for experienced cavers or, when water-filled,
Henry A. Schade obtain and exploit German science and technologies in areas immediately behind the front lines of fighting in Europe. As allied ground forces gained ground, Schade and his scientists would rush into the void left behind advancing forces to study the equipment and weaponry employed by the Germans. The United States Naval Technical Mission in Europe was particularly interested the capture and study of rocketry and all things naval as German ports and bases were wrested from Hitler's forces. Schade initially headquartered the Mission in Paris, but soon the Mission was constantly on the move as allied forces advanced more and