Paleontological Museum in Tocuila

International groups of archeologists discovered a large quantity of bones, mainly mammoth remains, estimated to be 11,000 to 12,000 years old, in an ancient river mouth that used to flow into the Lake Texcoco.

[1] While Joaquín Ramírez was overseeing the excavation and construction of a cistern in the property of his brother Celso, he noticed that the dirt being removed was different from what he usually would find when digging in that area.

Supposing it had to be bones, he informed his brother, who in turn, notified the Instituto Nacional de Antropología e Historia (INAH; National Institute of Anthropology and History).

The Paleontological Museum in Tocuila was opened in November 2001,[2] with the support of the property owners, the community, the University of Chapingo and the INAH.

[2][3] Claus Siebe, Peter Schaaf and Jaime Urrutia-Fucugauchi propose the lahar originated from the Popocatépetl volcano,[1] while the research of S. Gonzalez, D. Huddart, L. Morett-Alatorre, J. Arroyo-Cabrales and O.J.