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Enigmatic footprints, once thought to belong to a bear, linked to unknown human ancestor
By Katie Hunt
Footprint evidence of early hominin locomotor diversity at Laetoli, Tanzania
By Nathan E Thompson, Jeremy DeSilva & Ellison J McNutt
Prints Long Thought to Be Bear Tracks May Have Been Made by Human Ancestor (Published 2021)
By Isabella Grullón Paz
At least 2 bipedal human species lived nearly 3.7 million years ago
By Nell Greenfieldboyce