https://www.thebrighterside.news/post/eth-zurich-physicists-built-an-atomic-cannon-to-put-einsteins-theory-of-gravity-to-the-test/
ETH Zurich physicists built an 'atomic cannon' to put Einstein’s theory of gravity to the test -...
Sep 16, 2026 - Physicists created a controlled muonium beam that could enable the first direct gravity test using a second-generation particle.
theory of gravityeth zurichatomic cannonphysicistsbuilt