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originally posted by: theabsolutetruth
It isn't surprising. The statistical chances are that some of that extra solar system / galactic dust has been landing on Earth since forever.
Tonnes of space dust enters Earth's atmosphere every year. It is the haze seen on the horizon at sunset.
Every atom on earth originated in space.
We are stardust, literally.
originally posted by: 3n19m470
Yes we are made of stardust. Stardust from the same cloud of dust that formed our solar system. The significance of this discovery is that it is the first known dust from outside our system.