Atmosphere of Earth and balloons, and too low to permit orbital spacecraft. The mesosphere is mainly accessed by sounding rockets and rocket-powered aircraft. The stratosphere is the second-lowest layer of Earth's atmosphere. It lies above the troposphere and is separated from it by the tropopause. This layer extends from the top of the troposphere at roughly above Earth's surface to the stratopause at an altitude of about . The atmospheric pressure at the top of the stratosphere is roughly 1/1000 the pressure at sea level. It contains the ozone layer, which is the part of Earth's atmosphere that contains relatively high concentrations of
What Where the metallic floor accentuate the chilly atmosphere. O'Donnell said in interview: "[T]here is no set in the original play, but I argued that the whole play is about power and the abuse of power, and how information is power, so we used the library as a metaphor for somebody who has control of all the power and all the information. When it came to casting, I was looking for a particular type of actor – somebody who could bring a sort of menacing quality to the screen. There is a lot of menace in the play. "What Where" is about