The line between space and "not space" is really determined by our atmosphere.
| | | Science | | There's No Specific Boundary Where Space Begins... | | The line between space and "not space" is really determined by our atmosphere. Down here on the surface of the planet, it's thick enough to support life. Rising up through the atmosphere, the air gradually gets thinner. | | | | | | | |  | | READ THESE | | | | | | | | | | | | | | You are receiving this newsletter because you subscribed to the Today I Learned newsletter.
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