It's true we only recently have been able to built equipment sensitive enough to measure them. However, they were predicted in 1916 as part of Einstein's Relat

It's true we only recently have been able to built equipment sensitive enough to measure them. However, they were predicted in 1916 as part of Einstein's Relativity work: https://en.wikipedia.org/wiki/Gravitational_wave https://en.wikipedia.org/wiki/Gravitational_wave