The variations of the cosmic dust flux falling onto Earth since 40 Ma have been estimated using the noble gas composition of marine sediments
The influx of extraterrestrial material onto Earth is well known through the fall of meteorites, such as the one which may have caused the dinosaurs’ extinction 65 Myr ago. However, the main amount of extraterrestrial material reaching the Earth (~40,000 tons/yr) comes from sub-millimetric particles, called interplanetary dust particles and forming the cosmic dust, which generally originate from asteroid collisions […]
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