Scientists are on the trail of a mysterious five-particle structure that could challenge one of the biggest theories in physics: string theory. This rare particle—never seen before and predicted not ...

Relativity; the special and general theory by Einstein, Albert, 1879-1955; Lawson, Robert W., tr Publication date 1920 Topics Relativity (Physics) Publisher New York, H. Holt and company Collection ...

Thomas Mulligan explains how the orbit of star S2 near a black hole provides proof for Einstein’s theory of relativity.