Scientists use the Tokyo Skytree to test Einstein's theory of general relativity phys.org

Performing a stringent test of the theory of relativity requires either a very precise clock or a large difference in height.
Such space experiments have constrained any violation of general relativity to about 30 parts per million, a tremendously precise measurement that essentially shows Einstein to be correct.
The figure they attained for violations of general relativity was another validation of Einstein's theory, like others before.
More information: Masao Takamoto et al, Test of general relativity by a pair of transportable optical lattice clocks, Nature Photonics (2020).
Journal information: Nature Photonics Masao Takamoto et al, Test of general relativity by a pair of transportable optical lattice clocks,(2020).