Seonglae ChoOut-of-place Artifacts, OOPArts
OOPTHs 역시 복수형이고 OOPTH가 단수형이므로 영어로 쓸 때는 확실히 구분할 필요가 있다
기원이나 원리, 용도 등을 아직은 모르는 유물
Out-of-place artifact
An out-of-place artifact is an artifact of historical, archaeological, or paleontological interest found in an unusual context, which challenges conventional historical chronology by its presence in that context. Such artifacts may appear too advanced for the technology known to have existed at the time, or may suggest human presence at a time before humans are known to have existed. Other examples may suggest contact between different cultures that is hard to account for with conventional historical understanding.
https://en.wikipedia.org/wiki/Out-of-place_artifact
