An ancient stone monolith in England was likely an astronomical marker, according to new archaeological evidence.

The 4,000-year-old stone is triangular in shape and angles up toward geographic south. Its orientation and slant angle are aligned with the altitude of the sun at midsummer, researchers said.

And new evidence shows that there are packing stones around the base of the 7.2-foot tall (2.2-meter) monolith, indicating that it was placed carefully in its location and position, they added....