> How were giant ancient structures like Stonehenge, or the towering Moai heads on Easter Island, assembled at a time when cranes and trucks were still hundreds

> How were giant ancient structures like Stonehenge, or the towering Moai heads on Easter Island, assembled at a time when cranes and trucks were still hundreds of years away? Prehistoric people had ropes and they also had poles. I'm always baffled by this reluctance to admit that they simply used cranes, levers, and similar technology.