Isabel Hernando-Alonso, a researcher at the Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), is the lead author of a geochronological study published in the journal Quaternary Geochronology, in which the electron spin resonance and paleomagnetism methods were used to analyze the oldest sedimentary levels of the site known as Galería Complex in the Sierra de Atapuerca (Burgos), where the Covacha de los Zarpazos and Tres Simas Central caves lie.
