Abstract During the December 2020 total eclipse we registered time resolved light measurements of incident solar light with VIS-NIR photodiodes in northern Patagonia. Signals compatible with the observation of shadow bands in the 200 s before and after totality were observed. A strong increase in the normalized noise spectral densities of recorded incident radiation near totality suggests the presence of shadow bands. Originally high-altitude balloon measurements and spatial correlation ground measurements were planned, but the harsh climate conditions limited the campaign’s results.

A summary of results of multidisciplinary research aimed to the understanding of the transition between late archaic (ca. 5000-3800 BP) to early formative societies (ca. 3500-2400 BP), is presented. We suggest that the location of archaic and formative settlements in the ecorefuge of Quebrada Tulan are explained by a favorable cultural, social and environmental conditions, that allowed the transformation from a hunter gatherer society to a pastoralist one. The evidence of ceremonial architecture, the appearance of new technologies such us pottery, lito-sculpture, gold metallurgy between others and the profusion of rock art, may indicate an early complexity process in the western slope of the Circumpuna.

Se sintetizan los resultados de una investigación multidisciplinaria orientada a comprender la transición entre sociedades arcaicas tardías (ca. 5000-3800 AP) y formativas tempranas (ca. 3500-2400 AP). Se propone que la ubicación de los asentamientos arcaicos y formativos en el ecorrefugio de quebrada de Tulan, se explica por un conjunto de condiciones culturales, sociales y ambientales favorables, las cuales permitieron el cambio desde una sociedad cazadora-recolectora a otra principalmente pastoralista. La evidencia arquitectónica de carácter ceremonial junto a la aparición de nuevas tecnologías, como la cerámica, litoescultura, metalurgia en oro, entre otras, y la profusión de arte rupestre, nos indican un temprano proceso de complejización en la vertiente occidental de las tierras circumpuneñas.

Enterobius vermicularis eggs were found in human coprolites collected from the archaeological site of San Pedro de Atacama, North of Chile, in occupational layers dated from 1,000 BC. Agricultures and herding were begining at this period of time in this region of South America. The paleoparasitological data amplifies the knowledge about the distribution of human oxyuriasis in Pre-Columbian America.

Os autores realizaram exame parasitológico de vinte e seis coprólitos encontrados em um sítio arqueológico no norte do Chile, Província de Iquique.O material foi colhido em duas unidades de escavação, I e II (sitio Tiliviche) datados respectivamente de 5.900 a.C. a 4.100 a.C. e 4.110 a.C. a 1.950 a.C. e identificados como de origem humana.Na unidade II foram observados ovos de helmintos diagnosticados como de Diphyllobothrium pacificum. Esse achado nos informa sobre a antiguidade da infecção bem como sobre os hábitos alimentares dessas populações, uma vez que a contaminação se da por ingestão de peixes marinhos. E interessante assinalar que Baer (1969), ao descrever pela primeira vez a infecção humana por esse cestódeo em populações atuais do Peru, sugere a sua presença nas populações pré-colombianas.

Twenty six coprolites from an archaeological site in the province of Iquique, northern Chile, were examined for parasites. Coprolites were found in two excavation units, I and II (Tiliviche site), dated respectively at 5,900 B.C. to 4,110 B.C. and 4,110 B.C. to 1,950 B.C., and identified as of human origin. Only at the unit II coprolites containing helminth eggs identified as Diphyllobothrium pacificum were found. The presence of this tapeworm, a parasite of the American Sea Lion, in human coprolites, points to a diet which included marine fishes and provides information on the antiquity of infection by Diphyllobothrium pacificum. It is interesting to note that Baer (1969) suggests the presence of this tapeworm in pre-Columbian populations when diagnosing the first human cases in today's population in Peru.