5. Shuttle Discovery\'s Last Mission

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4. Surviving the Void

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The dangers of flying into deep space.

3. Open for Business

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Space is no longer just for governments. Little companies with big ideas are now reaching for the skies, making commercial human spaceflight a reality. Private businesses are investing big and aiming high, building their own rockets and orbiters, deploying commercial satellites to connect the globe, and preparing for space tourism. NASA's shuttle may have been grounded, but for corporations, the sky is no longer the limit.

2. The Moon and Beyond

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NASA's Apollo missions 40 years ago.

1. Into the Unknown

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The landing of NASA's Curiosity rover on Mars.