by Juan José Abad · Tapa dura · ISBN 9788422501589
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«La Tierra ¿planeta Experimental para los Extraterrestres?» is Juan José Abad's essay on the hypothesis that Earth is an extraterrestrial experiment.
Starting from the idea that planet Earth could be a testing ground controlled by beings from other worlds, the author reviews various enigmas attributed to extraterrestrial civilizations: alleged contacts, historical traces and phenomena associated with UFOs, documented with plates and illustrations.
Third volume of the collection «Los Enigmas de las civilizaciones extra-terrestres», published in 1977. Hardcover edition with illustrated plates outside pagination.
For fans of ufology and theories about extraterrestrial intervention in the past.
