tIME ABOUt A million and a ten genius of ted took one stone and carefully used itto s eardrop-s it  piece of advanced technology.

    It o existing tools t soon otor’s lead andmaking ually ed t seemed to do littleelse. “tattersall. “terally can’t move  stepping on t’s strange because te intensive objects to make. It .”

    From a sattersall took do, perand a  inc its  point, and  to me. It epping-stone. As a fiberglass cast it anzania, y-five pounds. “Itely useless as a tool,” tattersall said. “It o lift itadequately, and even t o try to pound anyt.”

    “  used for then?”

    tattersall gave a genial s tery of it. “No idea. It must ance, but we can only guess w.”

    tools, after St. Ac examples eentury, and contrastools kno Olduvai Gorge intanzania. In older textbooks, Oldoools are usually s, rounded, ones. In fact, paleoants noend to believe t tool part of Oldoones, wting.

    Noarted to move out of Africa sometools ecools, too. t distances. Sometimes took unso make into tools later on. ted to technology.

    But altools  Africa, Europe, and ern andcentral Asia, t never been found in t. this is deeply puzzling.

    In tologist named ools from t. terly direction across Europe and t to ty of modern-dayCalcutta and Banglades Asia andinto Cools   far beyond t, so oneteco t and t abandon it?

    “t troubled me for a long time,” recalls Alan tralian NationalUniversity in Canberra. “t round t of Africa in t . Yet to accept t you must believe t so fa