Discovery's look back at the birth of NASA is upon us, and USA Today has more information on what we can expect from the six part series. When We Left Earth: The NASA Missions will air over the next three Sundays at 9 p.m., complete with film restored to high definition that will surely reveal more than old SD broadcasts were able to handle. Narrated by Gary Sinise, there's also an interview with Neil Armstrong about walking on the moon and the troubled Gemini 8 mission. For a look at what we did before landing on Mars, hit the read link and then check Discovery tonight at 9 p.m.

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