I have it on the highest authority that Stonehenge was just a prehistoric prank done by teenagers of yore who thought "hey, let's make future scientists wonder what the heck we wanted to do with this".

check John Constable's painting of what it looked like in 1835 (biggest one I can find is here - 

http://upload.wikimedia.org/wikipedia/commons/3/3f/John_Constable_Stonehenge.jpg 

who put it back together I want to know...

Isn't it already known that Stonehenge marks out astronomical data, like eclipse cycles?
That's what I read anyway in a number of different books, such as The Bridge to Infinity by Bruce Cathie.

Actually, I just double-checked that - and it's Gerald Hawkins that published about the astronomical calculator aspects of Stonehenge; Bruce Cathie says it's even more involved than just being a calculator. So there ya go.

Even if it was 'only' landscape art, it's still one of many in that whole area that are a marvel to behold as you drive towards them and see them appear on the horizon.

People are idiots throughout history is the conclusion then eh, how about we decide to move on a bit though? Not much, just a bit I was thinking.

Let's see, huge lumps of rock, precarious balancing, no machines...

They're simply workplace related injuries. You wouldn't ship the corpses back to their home towns, so you'd bury 'em where you squashed 'em ;)

The interesting thing would be if the bones show signs of healing, as that would suggest that the people had survived the intial injuries.

If they do, I'd then do some isotope tests to see whether the new growth had occurred locally or where they were from.

If all the new growth was local, I rest my case!

Chiropractic was sheer tortion, back in the day! Mostly trial and error with a wee bit of brute force dramatics. Only the most wealthy could afford such therapy because of the clinic's monolithic overhead. Scullduggery on its finest footing. In it's heyday, Stonehenge was weigh ahead of its time.