2 ms·
Other than several hundreds tons of cosmic dust per day according to http://www.universetoday.com/94392/getting-a-handle-on-how-much-cosmic-dust-hits-earth/ htt
by jeffbarr 12y ago
Other than several hundreds tons of cosmic dust per day according to http://www.universetoday.com/94392/getting-a-handle-on-how-much-cosmic-dust-hits-earth/ http://www.universetoday.com/94392/getting-a-handle-on-how-m... .