Einstein Aether Theory
In physics the Einstein æther theory, also called æ-theory, is a controversial generally covariant generalization of general relativity which describes a spacetime endowed with both a metric and a unit timelike vector field named the æther. In particular such theory has a preferred reference frame and so is not Lorentz invariant.
Read more about Einstein Aether Theory: History, Consistency, The Action, Experimental Constraints
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“God is subtle, but he is not malicious.
[Raffiniert ist der Herr Gott, aber boshaft ist er nicht.]”
—Albert Einstein (1879–1955)
“Don’t confuse hypothesis and theory. The former is a possible explanation; the latter, the correct one. The establishment of theory is the very purpose of science.”
—Martin H. Fischer (1879–1962)