Using primitive meteorites called chondrites as their models, earth and planetary scientists at Washington University in St. Louis have performed outgassing calculations and shown that the early Earth ...

How long has our atmosphere been like the air we breathe today? What we have now is composed of about 78 percent nitrogen and 21 percent oxygen. Our earliest atmosphere was likely mostly hydrogen and ...

Organic haze in the atmosphere of Saturn’s moon, Titan, is similar to haze in early Earth’s air — haze that may have helped nourish life on our planet– according to a NASA Astrobiology Institute study ...