50 years, 50 giant leaps: How Nasa rocked our world

50 years, 50 giant leaps: How Nasa rocked our world - Features, Extras - The Independent: "Today, the National Aeronautics and Space Administration marks its first half-century of exploration and discovery. But missions to the Moon and beyond are only part of the story. Without Nasa's scientists, life on Earth would be very different indeed. Rob Sharp chronicles a technological revolution..."

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