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[Paper Spotlight] Walking in mud: Remarkable Pleistocene human trackways from New Mexico

This cool new paper reports on the discovery of a long, prehistoric human trackway from the Late Pleistocene in White Sands National Park, New Mexico. "These ancient footprints, found on a playa at White Sands in 2018, show what researchers believe to be a female or a young male walking for almost a mile, with a toddler's footprints periodically showing up alongside. The evidence reveals the person alternated from carrying the child, shifting the young one from side to side, by how the footprints broadened and slipped in the mud with the additional weight."




Abstract

"Human tracks at White Sands National Park record more than one and a half kilometres of an out- and-return journey and form the longest Late Pleistocene-age double human trackway in the world. An adolescent or small adult female made two trips separated by at least several hours, carrying a young child in at least one direction. Despite giant ground sloth and Columbian Mammoth transecting them between the outbound and return journeys, the human tracks show no changes indicative of predator/prey awareness. In contrast, the giant ground sloth tracks show behaviour consistent with human predator awareness, while mammoth tracks show no such apparent concern. The human footprints are morphologically variable and exhibit left-right asymmetry, which might be due to child carrying. We explore this morphological variability using methods based on the analysis of objective track outlines, which add to the analytical toolkit available for use at other human footprint sites. The sheer number of tracks and their remarkable morphological variability have implications for the reliability of inferences made using much smaller samples as are more common at typical footprint sites. One conclusion is that the number of footprints required to make reliable biometric inferences is greater than often assumed."

Click here to access the paper in Quaternary Science Reviews.

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