Ness of Brodgar, in Orkney, is one of the most important archaeological sites in western Europe. This week, it was covered by old, worn-out tires. Here’s why. ■ Thanks to the Ness team! More about them, volunteering, and donating: https://www.nessofbrodgar.co.uk/ I’m at https://tomscott.com on Twitter at https://twitter.com/tomscott on Facebook at https://facebook.com/tomscott and on Instagram as