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The defined boundary of space always reminds me of Jeannette Piccard, the first woman in space (as defined in 1934).

https://en.wikipedia.org/wiki/Jeannette_Piccard

It's interesting where we define what is an isn't space, with its own cultural ramifications.

It’s hard to argue that you’ve left the atmosphere, when the craft you’re using is supported by it. Hence the Karman Line.

Tereshkova has a much better claim to being the first woman in space.

You can reach the surface of a lake in a craft that floats on water so you should be able to reach the end of the atmosphere in a craft that floats on it.

The surface of a lake is much more well-defined, though, and has high density. You can't "float" on whatever you define as the "surface" of the atmosphere.

Jeanette Piccard and her husband Jean, another high-altitude ballooning pioneer, are also suggested to be ancestors of one Jean-Luc Picard, captain of the USS Enterprise.

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