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PRI's The World
May 12, 2017 · 2:30 PM EDT
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Tom and Tina Sjogren have circumnavigated the globe, walked across the North and South Poles and climbed Mount Everest. Now, they're talking about exploring Mars.
In Science, Tech & EnvironmentScience.
Tagged: Tina Sjogren and Tom Sjogrenmarsspace travelMoonnasaSpace Xspace explorationMars One.
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