• Terrence Aym
Many of the critics then raised issues of cost (Apollo's price tag was about $20 billion), the danger of risking human life in the unforgiving environment beyond Earth, and the ultimate return on investment. They argued that robotic space probes could accomplish many of the tasks done by humans. Years later their arguments were muted by the discovery that every dollar invested in the Apollo program returned as much as $20 overall...Curiosity promises to provide a better return on investment than that.
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