Roughly 100 tons of dust and small particles from outer space fall onto the Earth every single day — most of it microscopic, some of it older than our solar system — meaning the dust you find on your bookshelves and windowsills almost certainly contains, mixed in with the ordinary terrestrial dirt, a small fraction of material formed in the deaths of stars that exploded before the Earth itself was even born

Roughly 100 tons of dust and small particles from outer space fall onto the Earth every single day — most of it microscopic, some of it older than our solar system — meaning the dust you find on your bookshelves and windowsills almost certainly contains, mixed in with the ordinary terrestrial dirt, a small fraction of material formed in the deaths of stars that exploded before the Earth itself was even born – Space