5666 years. Researchers have also reconstructed the temperatures of the last 3622 years with tree rings from Fitzroya and have used a dendrochronology network of Lenga Beech, spanning from Talca to Navarino Island, to investigate global warming in the recent decades. Mapudungun language: UACh is one of the main sites of Mapudungun linguistic studies and teaching. This is partly due to Professor María Catrileo Chiguailaf, who received in 2009 the Provincial Prize for Conservation of National Monuments for her studies. Her work has focused on the phonology and morpho-syntax of the Mapudungun language and especially the verb forms. Catrileo may be the only living Mapuche to have mastered Spanish, English, and Mapudungun. Palaeontology: Palaeontological studies at Southern Chile have involved several UACh academics among them geoarchaeologist Mario Pino who participated at the excavation of the Quaternary fossil site of Pilauco Bajo in Osorno where the remains of a species of Gomphotherium were discovered. Two other Gomphotherium fossil sites in Los Ríos Region are planned to be excavated by university scientists in the future. Virology: Researchers from the Faculty of Medicine and Faculty of Science led a series of joint medical, viral and zoological research on the transmittance of Hantavirus between rodents and humans. Hantavirus was first detected in Chile in 1995 but is believed to have been present much time before. According to Dr. Luis Zaror the most important UACh discovery regarding Hantavirus was made in 2005 when Hanta antigens were found on the salivary glands of deceased persons. UACh academics working at the Laboratory of Virology had contributed to diminish the initial mortality of Pulmonar Hantavirus with 60% in Los Ríos Region below the national average of 37%. Scientific journals The university publishes several scientific journals three of them, Bosque, Archivos de Medicina Veterinaria and Estudios Filológicos are part of ISI's bibliographic database. BOSQUE is published by the Faculty of Forest Science. BOSQUE's first number was published in 1975 and was yearly issued until 1985. From 1985 to 2003 it was issued twice a year and from 2003 on thrice a year. The topics covered in BOSQUE are management and production of forestry resources, wood science and technology, silviculture, forestry ecology, natural resources conservation, and rural development associated with forest ecosystems. Contributions are articles, notes and opinions, both in Spanish and English. BOSQUE became part of ISI's bibliographic database in 2009. In matters of literature, communication science and linguistics