Also, the material swept up from the supernova, by the Earth is of the order of hundreds of tons (https://en.wikipedia.org/wiki/Death_from_the_Skies https://en.

Also, the material swept up from the supernova, by the Earth is of the order of hundreds of tons (https://en.wikipedia.org/wiki/Death_from_the_Skies https://en.wikipedia.org/wiki/Death_from_the_Skies!)