A National Oceanic and Atmospheric Administration exploration team recently uncovered several sets of mysterious holes on the floor of the Atlantic Ocean.
On Saturday, the NOAA ship Okeanos Explorer explored a volcano 1.7 miles underwater in the Mid-Atlantic Ridge, which at 10,000 miles is the longest mountain range on Earth, according to the NOAA’s expedition page.
As a two-person remotely operated vehicle explored the area, the expedition team found several sets of linear holes in the seafloor. They were stumped about the origin or cause of the holes, although they noted similarities to human-made holes and sediment nearby that suggested something dug the holes.