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Thanks for this, Andy. You missed out a key point, namely
"...they found the highest strontium isotope ratios in the remains were consistent with living in western Britain, a region that includes west Wales – the known source of Stonehenge’s bluestones."
It simply isn't good enough to say 'known source' as if it were a self-evident fact. Western Britain covers a fair amount of territory other than 'west Wales' last time I checked.
To be fair, academics often fall into this trap, i.e. not questioning findings from their peers that are published, in PEER-REVIEWED articles.
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