Einstein's theory of general relativity – the idea that gravity is matter warping spacetime – has withstood over 100 years of scrutiny and testing, including the newest test from the Event Horizon Telescope collaboration, published today in the latest issue of Physical Review Letters.  According to its findings, Einstein's theory just got 500 times harder to beat.  Despite its successes, Einstein's robust theory remains mathematically irreconcilable with quantum mechanics, the scientific understanding of the subatomic world. Testing general relativity is important because the ultimate theory of the universe must encompass both gravity and quantum mechanics.

Yosuke Mizuno, who joined TDLI as a T.D.Lee Fellow recently, is the Theory & Simulation Working Group Coordinator in EHT. He has performed 3D GRMHD simulations of magentized accretion flows and created black hole shadow images by general relativistic radiation transfer calculation to develop simulation & image library which use the template for the comparison of EHT observational data. He is one of the leading author of first EHT M87 collaboration paper, paper V: Physical Origin of the Asymmetric Ring (https://iopscience.iop.org/article/10.3847/2041-8213/ab0f43).

Please refer EHT press for full story of it.
EHT press: https://eventhorizontelescope.org/blog/einsteins-description-gravity-just-got-much-harder-beat-0