Strange lights, unexplained objects, and mysterious movements beneath the waves have been appearing off U.S. coastlines in numbers that are leaving both scientists and UFO enthusiasts stunned. A recent report by UFO-tracking app Enigma reveals that thousands of sightings of Unidentified Submersible Objects (USOs) have been logged near rivers, lakes, and oceans, suggesting that unexplained phenomena are not confined to the skies. Some of these objects reportedly rise from the depths or plunge