3 ms·
Have you guys seen the SUPER SUPER LARGE sealed ecosystem. It's called earth. It's amazing how long it has lasted without any significant mass coming in or go
by source99 12y ago
Have you guys seen the SUPER SUPER LARGE sealed ecosystem. It's called earth. It's amazing how long it has lasted without any significant mass coming in or going out.
- jeffbarr 12y agoOther 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... .
- Luyt 12y agoEarth also loses helium and hydrogen. The current rate of loss is about three kilograms (3 kg) of hydrogen and 50 grams (50 g) of helium per second, according to Wikipedia. http://en.wikipedia.org/wiki/Atmospheric_escape http://en.wikipedia.org/wiki/Atmospheric_escape