Growing up, MukhammadAziz Umurzokov would spend hours analyzing scans of his own spinal cord — scrutinizing his nerves, his discs, his bones, noticing how they shifted after the surgery that changed ...
What did researchers find? A 1.6-to-1.5-million-year-old skull from Ethiopia combines features from two different stages of human evolution. The braincase and brow ridge match Homo erectus, but the ...