Since the late 1950’s us humans have been flying rockets. Also about in the late 1950’s us humans started switching to flying jet planes instead of propeller planes. Jet planes are sucking up the moisture out of our atmosphere which causes there to be less atmospheric pressure because water vapor molecules act like pressure producing molecules which create an ideal atmospheric environment where the cold molecules from space meet with the warmer molecules emitted ONLY from what was going on the surface of the Earth.