Every few years this happens. Some television documentary or viral post drags up the thoroughly debunked idea that Stonehenge was either built by Romans, Druids of a much later period than the monument's actual age, or - my personal favourite from last week's encounter on another forum - "Atlanteans who colonised prehistoric Britain." And then people arrive here, on a forum that has been discussing this stuff seriously for years, and state it with absolute confidence as though we haven't all heard it before.
For the record, and I'm going to use my teacher voice here: the current consensus dates the major sarsen construction phase at Stonehenge to approximately 2500 BCE. The Romans didn't arrive in Britain until 43 CE. That is a gap of roughly two and a half thousand years. Julius Caesar was closer to us in time than he was to the people who built Stonehenge. This is established, peer-reviewed, radiocarbon-dated archaeology and it's not particularly controversial among people who study it.
I raise this not to be a snob - genuinely - but because there's an irony I find maddening. The real story of Stonehenge is astonishing. The bluestones came from the Preseli Hills in Wales, roughly 200 miles away. The social organisation required to transport and erect these things in a pre-wheel, pre-iron-tools society is genuinely staggering. You don't need to invent Atlantis to make Stonehenge extraordinary. It already is.
Rant over. I'd love to hear whether others have a strategy for engaging with this stuff constructively rather than just getting frustrated. Do you bother? Do you point to sources? Do you just... let it go?