9 facts about the atmosphere

#1. Earth Has Had Three Atmospheres.

#2. Oxygen Caused the First Major Extinction

#3. The Sky Should Be Violet

#4. The Atmosphere Extends 6,200 Miles into Space

#5. It Protects Us from Meteors

#6. There are five layers within the atmosphere

#7. The atmosphere surrounds the planet, protecting it by absorbing the ultraviolet radiation from the sun, and regulating the temperature extremes that would otherwise occur between day and night.

#8. The troposphere lies closest to the Earth and is about 11 miles thick

#9. Blood Boils After 60,000 Feet into the atmoshpere