I don’t remember the details in the series but this was jarring. It was asserted as a fact (by the lady, IIRC, so not a specialist) without any nuance whatsoeve

I don’t remember the details in the series but this was jarring. It was asserted as a fact (by the lady, IIRC, so not a specialist) without any nuance whatsoever. That said, the OP is harsh. There are a couple of dodgy “facts” such as this one, but remarkably few for such a long mainstream TV programme.