The MRD fossil was found near a former lake and river delta; the lake was salty at times, and the watershed was often dry. Some forested areas existed by the shore of the delta and the river that fed the lake, but it was basically a dry region. The researchers aren’t sure what foods sustained A. anamensis at this location, saying an isotopic analysis of MRD’s teeth could provide some clues.
https://gizmodo.com/incredible-fossil-discovery-finally-puts-a-face-on-an-e-1837657550/amp
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