🚨Breaking news: New dating confirms a prehistoric origin for King Arthur's Hall on Bodmin Moor, N Cornwall, as many of us have long suspected. This is amazing news but where's the credit for the amateur researchers who kicked this off and pushed for the dating to happen? More 1/ BBC News SW report that researchers working on behalf of the Cornwall Archaeological Unit (CAU) were joined by volunteers for the dig, which began in 2022. Samples taken from the monument, including pollen, insects and parasite eggs, were radiocarbon dated. The results were combined with other dating techniques, such as Optically Stimulated Luminescence, to give a date of between 5,500 and 5,000 years ago. More here: bbc.co.uk/news/articles/… /2

A new analysis of Stonehenge’s Altar Stone published today in Nature shows it is likely to have come from NE Scotland, at least 750km from its current location! We have an exclusive article by Rob Ixer and Peter Turner. Pic:Rob points out the Altar Stone's current location 1/ 🧵 Mineral grains were dated to show they have great age - originating from the ancient landmass of Laurentia (now N. America & Scotland) - rather than from Ganderia, Meguma or East Avalonia which underlie England and Wales. 2/

A thread to round up in English what we know so far on the appalling destruction of the Chemin de Montauban stone row. Here’s the Mr Bricolage construction site, as seen in 2023 on Google Street view. In the foreground are possible remains of megaliths. 🧵1/ Reportedly 39 ancient stones in Carnac, have been destroyed during the construction of a DIY store. The site is in the village of Montaubin, a little over 1.5km away from the better known locations of Kermario and Ménec. 2/

We had a lovely walk to the prehistoric barrows above the Long Man of Wilmington yesterday with @MorrisJonathan
And measured the size of the world! Read on for more
Thread 1/n #StandingStoneSunday As you can see you need a measuring rod (or two). They need levelling, which can be done quite simply by carving out a trough in them and adding water to check the level. 2/