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A mere $1.5 million later, they had a solution. NASA now had a pen that worked in zero gravity, in a vacuum, and in a drastic temperature range.
The Russian cosmonauts had the same problem, of course. So they used a pencil.
Now, this anecdote isn’t historically accurate, and has become a bit of an urban legend. The truth is both the US and Russia used pencils at first, and Paul Fisher independently created the pen and sold 400 of them to NASA for a song.
The reason the exaggerated story is so widely embraced, though, is because it rings true.
We often expend large amounts of time and effort creating elaborate solutions to problems when a simple answer is right under our noses.
Source, Brian Clark, Teaching that Sells, E-Book, 2.