I'm a physics graduate now working with computers. I study GR in my spare time to keep the material fresh. In the Wikipedia article about the mathematics of GR, one can read the following: The te...| Physics Stack Exchange
There are a lot of articles on the net that mention Nikola Tesla's ether (aether) theories, such as this quote: Only the existence of a field of force can account for the motions of the bodies as| Physics Stack Exchange