The Tepexpan Man is a Pre-Columbian-era skeleton, discovered by archaeologist Helmut de Terra in February 1947, on the shores of the former Lake Texcoco in central Mexico.

Dr. Silvia Gonzalez, a professor of geoarchaeology at John Moore University in Liverpool, used uranium isotope analysis to date the skeleton.

[7] In his preliminary report, Helmut de Terra claims that "The other bones, in conjunction with the skull, indicate that the person was of male sex.

De Terra hypothesized that due to his fracture and the proximity to mammoth fossils, Tepexpan Man may have been a hunter who was either killed by his fellow men or mortally wounded while hunting.

[3][6][7] The Science Newsletter claims that the individual suffered from a stiff neck due to the many limy deposits on the cervical vertebrae.

[7] Dr. Gonzalez also reconstructed the environment of Lake Texcoco around the time of Tepexpan Man by analyzing sediments and fossils from the area.

Dr. Gonzalez and her team analyzed sand, clay, and volcanic ash, as well as fossils of diatoms (microscopic algae) and ostracods (a form of small crustacean).

These lines of evidence suggest that there were large changes around Lake Texcoco in terms of the balance between aquatic and terrestrial plants, C3 and C4 plants, saline, alkaline and freshwater conditions, volcanic activity, reworking of lake sediments, and input from the drainage basin throughout the late Pleistocene and late Holocene.