shifts, sitting alone in the cockpit, monitoring the shuttle's performance as it orbited the earth time after time.
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For seven days Fred circled the earth. Though he didn't know it, his experience was remarkably similar to that of Borman, Lovell and Anders. At one point the parallels were uncanny. Though the mission itself went smoothly, the life sciences experiments involved two monkeys and two dozen white rats. Unfortunately, the cages were not well sealed, and before too long floating animal feces and dried food particles drifted throughout the shuttle. Like the Apollo 8 astronauts decades before, Fred spent a good portion of his free time trying to scoop floating feces out of the air.
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In other, more significant ways, Gregory's experience was very different from that of the astronauts on Apollo 8. The shuttle was large, more closely resembling the spaceships in the movie 2001: A Space Odyssey than the Apollo 8 capsule. The shuttle had three separate decks, and could accomodate eight astronauts comfortably, and ten in an emergency. Its atmosphere was a mixture of twenty percent oxygen and eighty percent nitrogen, rather than pure oxygen. The kitchen area on the middeck included an oven for reheating food packages, color-coded utensils and food packs for each astronaut, and condiments such as salt, pepper, taco sauce, hot pepper sauce, catsup, mayonnaise and mustard. Its cargo bay was so large that four Apollo 8 capsules could fit within it. Rather than splashing down in the ocean, the shuttle landed on a runway like an airplane. And above all, it was reusable .
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These were the engineering differences. Other disparities were far more profound. When Gregory stared down at the blue, white, and brown planet below him, he did not see a fragile, delicate Christmas ornament as did Borman, Lovell, and Anders. Instead, he saw something incredibly robust and sturdy, a grand and tough planet that actually seemed capable of healing itself repeatedly despite any and all forms of injury.
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This impression was further strengthened on Gregory's final shuttle flight before he retired from active duty. On November 25, 1991 he took off as commander of the shuttle Atlantis on a seven-day mission. Besides putting a military surveillance satellite into orbit, the crew spent most of its time conducting earth observation experiments.
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