Gravitational waves were first predicted by Albert Einstein and later indirectly confirmed in an number of experiments. Recently leading physicists announced that they may have a 'solid' proof that these waves exist. I wonder why we need to spend so much money on study of this phenomena. I can see at least two reasons: 1. Confirm one of the key predictions of Albert Einstein’s general theory of relativity. 2. Detect cataclysmic events in cosmos (such as collision of two black holes etc.)
Are there any benefits of this study in the fields of renewable energy (like newer, more efficient energy sources) or advanced propulsion technologies (building of faster space ships)?