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But there was a problem. The rock surrounding it was estimated to be millions of years old. Far older than human civilization. Artifacts like this are sometimes called “out-of-place objects.” Items discovered in places where they shouldn’t logically exist. Some researchers believe they might b…

But there was a problem. The rock surrounding it was estimated to be millions of years old. Far older than human civilization. Artifacts like this are sometimes called “out-of-place objects.” Items discovered in places where they shouldn’t logically exist. Some researchers believe they might be natural formations that only resemble technology. Others think they could be mistakes in dating the rock layers. But there are still discoveries that remain unexplained.