Stonehenge

Next, we went to Stonehenge.  It was getting late, but we paid the money and got an audio lesson that took about 30 minutes.  They told us what they know about Stonehenge  and what they don’t know.  It was fascinating.  It is an ancient calendar.  The openings between the stones allow the sun to strike the center stone.  Beginning with each solstice, and moving in a circle.  The large upright rocks are buried 1/3 in the ground.  They came from Northern Scotland.  We don’t know how they got them there.  They are all carved so that they fit together.  How’d they do that and why?