Femoral-Tubercle Discovery Pushes Bipedalism to 7 MYA in Sahelanthropus

Paleoanthropology has repeatedly swung on single bones: the 1924 Taung child shifted human origins to Africa, while the 1912 Piltdown forgery misled the field for 40 years. This new claim fits that pattern, leveraging 21st-century 3D morphometrics rather than chisels, yet still resting on fragmentary remains from one site. It reflects the long trend toward pushing key human traits—stone tools (Lomekwi, 3.3 MYA), fire use (Wonderwerk, 1 MYA), now bipedalism—incrementally deeper in time as methods improve. If upheld, the finding rewrites the adaptive landscape after the Pan–Homo split, implying upright walking preceded brain expansion by at least five million years; if overturned, it will join a lineage of contested “earliest ancestor” announcements. Either way, on a 100-year horizon this debate illustrates how technological re-inspection, not new digs, is increasingly steering human-origin narratives.