Image 1) "A perspective of future gravity cartography being used with 0.5 m spatial resolution over a region, at an uncertainty level of 20 E. Expected signal sizes for a range of applications are shown. Credit: Stray et al. 2022 Nature DOI: 10.1038/s41586-021-04315-3" (ScitechDaily/Quantum Gravity Sensor Breakthrough Paves Way for Groundbreaking Map of World Under Earth’s Surface) When researchers are proven that the gravitation waves exist they can make systems that benefit that kind of phenomenon. We can think that gravitation is like light or any other wave movement. The source of the gravitational waves is in the material. That means if there are thicker points in the ground that allows benefiting gravitational waves. For making maps of underground structures. The idea is that the thick points are sends more powerful gravitational waves than thin points. So the differences between the thickness of the ground are the thing that allows making maps of underground structur