Explorers have discovered a series of mysterious, "perfectly aligned" holes punched into the seafloor roughly 1.6 miles (2.6 kilometers) beneath the ocean surface, and they have no idea who or what made them.
The strange holes were spotted by the crew of the National Oceanic and Atmospheric Administration's (NOAA) Okeanos Explorer vessel as they investigated the Mid-Atlantic Ridge — a mostly unexplored region of the seafloor that is part of the world's largest mountain range.
The holes form a straight line and appear at regularly repeating distances, and they are surrounded by tiny mounds of sediment.
Source
The strange holes were spotted by the crew of the National Oceanic and Atmospheric Administration's (NOAA) Okeanos Explorer vessel as they investigated the Mid-Atlantic Ridge — a mostly unexplored region of the seafloor that is part of the world's largest mountain range.
The holes form a straight line and appear at regularly repeating distances, and they are surrounded by tiny mounds of sediment.
Source