This illustration shows you how the builders likely moved the large blocks to construct Malta’s temples. First, the blocks were rolled along the ground using round stones like ball bearings. Eventually, the base of each block was notched to accept the “ball bearings,” which acted as pivot points when levering the block into place and positioning it. Once the blocks were seated, other oddly-shaped stones were stuck into the notches to anchor the blocks and keep them from tipping over. In the previous photo, you can see these notches and their “plugs.” Who says prehistoric people weren’t too bright?