The large stones at Stonehenge are sarsen, a form of sandstone. While they're a good deal harder than the sandstone that the Pyramids of Gizeh are made from, they're still subject to weathering. read more
The large stones at Stonehenge are sarsen, a form of sandstone. While they’re a good deal harder than the sandstone that the Pyramids of Gizeh are made from, they’re still subject to weathering. They may have simply worn down to the point that they would no longer support themselves (or the stones on top of them). read more
Stonehenge is believed to have numbered 75 large vertical stones in total. Two circular rings of much smaller blue stones were also constructed inside the horseshoe shape and between it and the outer ring. The purpose of these smaller blue stones has not yet been determined. read more