gravitational waves have been detected and confirmed by several experiments, most notably the Laser Interferometer Gravitational-Wave Observatory (LIGO). These experiments have provided strong evidence for the existence of gravitational waves, which are ripples in the fabric of spacetime caused by the acceleration of massive objects.
Gravitational waves are predicted by Einstein's theory of general relativity, which describes gravity as the curvature of spacetime caused by mass and energy. According to this theory, gravitational waves are created when massive objects accelerate, such as when two black holes orbit each other or when a massive star explodes in a supernova.
The detection of gravitational waves supports the idea that gravity does interact with itself. Gravitational waves carry energy away from the source and propagate through space, causing a disturbance in the gravitational field. This means that gravitational waves can affect other gravitational fields and interact with other gravitational waves.
It's worth noting that the direct observation and confirmation of gravitational waves have provided a robust validation of Einstein's theory of general relativity. However, it's always possible that future scientific advancements and experiments could lead to new discoveries or refinements of our understanding of gravity. Science continually evolves, and our understanding of complex phenomena like gravity can deepen over time.