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Another claim is that space exploration is a necessity to mankind and that staying on Earth will lead to extinction. Some of the reasons are lack of natural resources, comets, nuclear war, and worldwide epidemic.
Video: Space Travel: History, Dangers & Benefits. Space is fascinating. Humans have been sending objects into space for decades, trying to learn about Earth and what's beyond. But while space travel can be beneficial, there are also risks that come along with exploring the rest of the universe.