Microscopic fragments of glass from the Moon have revealed a history of lunar impacts that lines up precisely with meteorite impacts here on Earth – including the giant asteroid impact 66 million years ago that killed most life on Earth and wiped out...
The study also suggests that large impact events on Earth, such as the Chicxulub"If this is correct,","it suggests that the age-frequency distributions of impacts on the Moon might provide valuable information about the impacts on the Earth or inner Solar System."
This means that if scientists get their hands on some of these spherules, they can study them to learn more about how, when, and the environment in which they formed. The Chang'e-5 lunar sample return mission offered an opportunity to do just that. This is a technique based on the radioactive decay of uranium into lead. Since we know how long uranium takes to decay, the relative amounts of uranium and lead in a sample can give us an estimate of the sample's age.
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