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Lunar glass and asteroid impacts on earth

30 September 2022

At https://phys.org/news/2022-09-lunar-glass-moon-asteroid-impacts.html … which concerns a research paper in Science Advances – see https://www.science.org/doi/10.1126/sciadv.abq2542 … major impacts on earth were accompanied, very often, by smaller impacts on the moon, it is being claimed. The researchers studied microscopic glass beads that were found in lunar soil brought back to earth in 2020 as part of the Chinese NSA lunar mission. The heat and pressure of meteorite impacts created the glass beads and their age distribution appears to mirror bombardments of the earth. Or that is the finding. Unsurprisingly, they found evidence of small impacts at the K/Pg boundary event, the end of the dinosaur dominance. The research is ongoing and it is hoped to work out a better record of earth encounters with space rocks by studying lunar soil. This makes sense as lunar soil, unlike the soil on earth, has not been affected by ploughing or plant growth, or even sedimentary formations after impacts. It is also more practicable than researching the earth for evidence of impacts, and this is therefore a good avenue for future research.

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