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科学家终于发现重力波的存在，进而验证爱因斯坦广义相对论所预言的一种以光速传播的时空波动，是时空曲率的扰动以行进波的形式向外传递的一种方式。但问题出现了，重力波有啥用？说白了，没用。

However, it is exactly the difference between pure science and applied science.

Richard Feynman: "Physics is like sex.  Sure, it might give some practical results, but that's not why we do it."