What can you say when a rock is found that has metal screw-like objects deep inside it? In other words, the rock formed around the metal objects... and how long does that take? There have been many such objects discovered, and a few of them have been added to our "Most Puzzling Ancient Anomalies" gallery.
How can they be explained? Are geologists mistaken about how long it takes hard rocks to form? Or is our history wrong? Do these artifacts come from some unknown civilization that existed tens of thousands or even millions of years ago? These puzzling artifacts raise these nagging questions. Go look.