Solved cryptogram
The atmosphere is a thin skin. Half its mass lies below the height a jet aircraft cruises at.
Earth Science Facts, sourced to NASA.
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What it means
Air thins out rapidly with altitude rather than tapering gently, so half of it sits within about five and a half kilometers of the surface. On a globe the size of an apple, the breathable atmosphere would be thinner than the skin. Astronauts consistently describe this as the thing that photographs fail to convey and that seeing it in person changes.
The claim comes from NASA.
- SourceNASA
- CollectionEarth Science Facts
- Difficultymedium
- Length74 letters, 20 unique
Nearby in the collection
The facts either side of this one.
About as hard as this one
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