What is a name for a type of private club in city outskirts or rural areas that usually offers a variety of recreational sports facilities such as golf, tennis, swimming and polo?
In the southern USA, what is the name for an embankment that allows the water to flow at a higher level than the surrounding land?
What name is given to fluctuations in the curvature of spacetime that were predicted to exist by Albert Einstein in 1916 on the basis of his theory of general relativity?
