One glaringly obvious one, was more about poor judgement but filled with scientific boffins.

A TV prog about a cemetery (outwith the churchyard) full of skeletons from specific eras. These eras were charcterised by poor harvest, volcanoes etc.

At such times, poor people would have ate whatever was available, and rye for breadmaking that had been stored too long would be raided. Rye contains ergot (think LSD) and if left the fungus grows. The "trip" that ensues would have made those people look like demons possessed. In those days they would be poor, outcast and considered unholy. Even if they survived (& tainted) they would not ultimately been buried in a churchyard.

Yet the boffins never hinted at the distinct possibility. They concluded "unknown"!