Relevance:
Space is final frontier and something that has intrigued humans ever since civilisation began to emerge. 20th century would have been first time in human history that the final frontier was explored. By the 21st century humans have sent probes outside the solar system, collected samples from other planets, asteroids and comets and even setup a gaint space observatory orbiting earth at an altitude at about 400km above sealevel. These space explorations cost millions of dollars and other resources to be executed and occassionally questions are raised about the necessity of space explorations when such resources could be used for people on earth.
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