Scientists use the Tokyo Skytree to test Einstein`s theory of general relativity
(PHYSorg.com Physics)

In another verification of the validity of Einstein`s theory of general relativity, published in Nature Photonics, scientists from the RIKEN Center for Advanced Photonics and Cluster for Pioneering Research, with colleagues, have used two finely tuned optical lattice clocks, one at the base and one on the 450-meter observatory floor of Tokyo Skytree, to make new ultraprecise measurements of the time dilation effect predicted by Einstein`s theory of general relativity.