Word: exo
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...that will stick out a tongue of transparent tape, touch it to the planet's soil, and draw it back again for study by a built-in microscope. The enlarged pictures of dust particles could be transmitted to the earth by radio, should tell whether the soil has exo-organisms...
...humans should be cautious about visits to other planets, Lederberg warned. Living microbes introduced from earth might quickly destroy any primitive exo-creatures. Conversely, the first space traveler who returns from Mars or Venus may bring with him fast-multiplying forms of extraterrestrial life. "The introduction of foreign organisms," said Lederberg, "might have disastrous consequences to our health, agriculture, economy or comfort." He urged that all humans landed on foreign planets be quarantined there until they are sure that no exo-pestilence will ride with them back to the earth...