What did the archaeologist discover about early man's ability at Stonehenge and Easter Island?

Stonehenge and Easter Island have enormous boulders that have been moved great distances. It took a lot of engineering to accomplish those feats.

Shape and also transport (sometimes over considerable distances) large pieces of stone which they then managed to erect in their chosen location. It is a remarkable example of man moving large intact objects, carve things, and have an understanding of the relationship of the Sun to the seasons and calendar.

They planned and built complex structures, placed large statues and figured out ways to lift things in a time when man had no machines to help them do this. It is a mystery today how they built Stonehenge, and got the Statues on Easter Island.