Before the dawn of the space age, it was difficult to gauge the feasibility of life beyond Earth. Was Earth the sole harbor of life, or did intelligent beings permeate the heavens? The impenetrable clouds of Venus, indistinct shadings on Mars, and imagined structures on the Moon allowed scientists and science fiction authors alike to populate the Solar System with cosmic neighbors.
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Before the dawn of the space age, it was difficult to gauge the feasibility of life beyond Earth. Was Earth the sole harbor of life, or did intelligent beings permeate the heavens? The impenetrable clouds of Venus, indistinct shadings on Mars, and imagined structures on the Moon allowed scientists and science fiction authors alike to populate the Solar System with cosmic neighbors.
