OOPArts are out-of-place artefacts, though other objects of historical, archaeological, or palaeontological interest are included. The term was coined by the naturalist and cryptozoologist Ivan T. Sanderson. It isn’t a term used by mainstream scientists as it may be considered tainted with unprofessionalism; it is largely used by those who study the pseudo-scientific topics such as paranormal activities, fringe theories such as ancient astronauts, or the topic of creatures such as Bigfoot and the Loch Ness Monster.
Having said all that, I find it interesting to read about various objects that have been labelled as OOPArt. Here are a few:
The Abydos Helicopter
The Wolfsegg Iron
The Baghdad Battery
The Dendera Lamps
The Cambodian Stegosaurus
While some may be explained with scientific methods, other official “scientific” explanations seem to me, frankly, far-fetched. Judge for yourself, and enjoy the curiosities of our planet’s history!
History Undusted 