Juan de Cárdenas’s Problemas y secretos maravillosos de las Indias

Record summary

Juan de Cárdenas’s Problemas y secretos maravillosos de las Indias is an early printed work examining natural curiosities reported in the Americas, including atmospheric, meteorological, biological, and geographical marvels. It is a useful comparison lead because it shows how colonial observers classified unusual phenomena before modern scientific terminology, placing wondrous reports within natural philosophy rather than automatically treating them as supernatural or technological. It does not constitute one discrete UFO case; its value lies in its cataloguing method and explanatory categories.