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Sergey Brin Co-founder Google “I have high hopes for the Mars settlement, so I’ll book my one-way ticket first, and maybe we’ll save you for the Jupiter trip.” - Speaking to Larry Page, 2008 SPACE ACTIVITIES: Invested $5 million in Space Adventures, a space-tourism company. Brin intends to fly himself eventually. FUN FACT: Brin’s mother, Eugenia Brin, is a scientist at NASA’s Goddard Space Flight Center. NET WORTH: $12 Billion