Here’s the math:

Facebook IPO: $100 billion valuation Mark Zuckerberg’s ownership: 24% [0] Value: 24 billion USD

Cost of the Mercury Project (to put a man into orbit around the earth) Total: $392.6 million (1969 dollars) [1]

Present day cost of Mercury Project: $2.457 billion USD [2]

By selling 10% of his personal shares, he could finance his own personal space program.

Mercury Space Program, the Mercury Capsule creating a parabolic arc over the ocean.

[0] http://en.wikipedia.org/wiki/Template:Facebook_navbox

[1] http://en.wikipedia.org/wiki/Project_Mercury

[2] https://www.wolframalpha.com/input/?i=392.6+million+1969+dollars

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