ABSTRACTThe conclusion that tektite falls were restricted in time to an earlier era in Earth history is supported by all known facts, in particular, by the results of critical examinations of various reported falls, including 2 australite falls described not long ago by the late Dr. E. S. Simpson. On the contrary, if the tektites originate as “lunar impactites,” as Dr. H. H. Nininger has recently suggested, it seems evident that they would have continued to fall onto the Earth right up to the present time. Furthermore, the probability that the distribution of “lunar impactite” falls over the Earth's surface would exhibit the alinement along 3 great circles, which is characteristic of all known tektite deposits, is vanishingl