https://www.popularmechanics.com/science/archaeology/a46571714/scientists-have-traced-the-lost-journey-of-stonehenges-mysterious-megaliths/
More origin stuff...
Interesting article. Yet another sign of the capacity of science to help illuminate the past. However, the headline goes far beyond what the scientific evidence allows us to say, as the final paragraph concedes.
Doesn't it always... ;D