did-you-kno: Scientists found cosmic dust on city rooftops for the first time. 500 grains of 4.6 billion-year-old cosmic dust were identified after filtering nearly 700 lbs of sludge from gutters in Oslo, Paris, and Berlin. We’ve known since

did-you-kno: Scientists found cosmic dust on city rooftops for the first time. 500 grains of 4.6 billion-year-old cosmic dust were identified after filtering nearly 700 lbs of sludge from gutters in Oslo, Paris, and Berlin. We’ve known since

tags: ciel62,

from: https://ciel62.tumblr.com/post/154250235241