Eiseley took the occasion of the lunar landing to consider how far humans had to go in understanding their own small corner of the universe, their home planet, much less what he called the 'cosmic prison' of space. Likening humans to the microscopic phagocytes that dwell within our bodies, he grumpily remarks, 'We know only a little more extended reality than the hypothetical creature below us. Above us may lie realms it is beyond our power to grasp.' Science, he suggests, would be better put to examining that which lies immediately before us, although he allows that the quest to explore space is so firmly rooted in Western technological culture that it was unlikely to be abandoned simply because of his urging. Eiseley's opinion continues to be influential among certain environmentalists, and these graceful essays show why that should be so.