NOAA explorers have discovered a “sonar anomaly” off the coast of North Carolina. Scientists have speculated the site could be anything ranging from a shipwreck to a geological formation.

A strange "sonar anomaly ... North Carolina on Wednesday, hoping for an explanation. NOAA has not been afraid to notch up suspense about the area, noting it could be "an archaeology site, a ...

A strange “sonar anomaly” had NOAA explorers diving off the coast of North Carolina on Wednesday ... noting it could be “an archaeology site, a geological formation or otherwise.” ...

The east coast of North America was once as wild as the West, with massive mountains rising between colliding tectonic plates, volcanoes belching lava and giant faults slicing the crust.