Cosmic dust in terrestrial ice

For the last 30,000 years, our planet has been hit by a constant rain of cosmic dust particles. Scientists have reached this conclusion after investigating the amount of the helium isotope 3He in cosmic dust particles preserved in an Antarctic ice core.

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<p><a href="http://www.physorg.com/news73231283.html">Cosmic dust in terrestrial ice</a></p> <p>For the last 30,000 years, our planet has been hit by a constant rain of cosmic dust particles. Scientists have reached this conclusion after investigating the amount of the helium isotope 3He in cosmic dust particles preserved in an Antarctic ice core.</p>