1.4-million-year-old footprints reveal a surprisingly large human relative

Ancient footprints in Kenya reveal that eight Paranthropus boisei may have traveled together 1.4 million years ago, with some individuals reaching surprisingly large, human-like body sizes. The tracks offer a rare glimpse of their social behavior and suggest these extinct human relatives may have lived in more complex groups than previously thought. 1.4-million-year-old footprints reveal a surprisingly large human relative.

1.4-million-year-old footprints reveal a surprisingly large human relative Science News from research organizations 1.4-million-year-old footprints reveal a surprisingly large human relative A 1.4-million-year-old footprint trail reveals a surprisingly large group of ancient human relatives traveling together along a Kenyan lakeshore. Date: August 30, 2026 4 million years ago, with some individuals reaching surprisingly large, human-like body sizes. Twitter Pinterest LinkedIN Email 4-million-year-old footprints that the team excavated.

The tracks, preserved near an ancient lakeshore, appear to record eight Paranthropus boisei individuals occupying the same place at roughly the same time. Researchers describe the discovery as a snapshot of "fossil behavior" because, unlike bones that can accumulate over long periods, footprints can capture a brief moment in the lives of individuals. The international team, made up of researchers from the US and Kenya, concluded that all eight trackmakers were likely adults.

Several also appear to have been considerably larger than earlier estimates of Paranthropus boisei body size based on the limited skeletal remains available.