Mars is a big boy. At 4.5 billion years old, the Red Planet can surely take care of itself by now—but you wouldn’t know it based on the great lengths NASA and friends go to protect it from contamination by Earthly debris. Some astrobiologists think these measures are unnecessary.
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In the early days of space exploration, NASA basically made up procedure on the fly. With little knowledge of the world outside our atmosphere, agency physicians worried what humans might encounter out there. Maybe John Glenn would go Space Blind. Maybe the Apollo 11 crew would track an Andromeda Strain through the Lunar Command Module, unleashing a deadly moon virus on a defenseless earth. More »
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