Lindberg's team, which has had success in the past recovering sunken ships and cargo, was using sonar to look for the century-old wreck of a ship that went down carrying several cases of a super-rare champagne. Instead, the team discovered what it claims is a mysterious round object that might (or might not) be extraterrestrial.
Lindberg explained to local media that his crew discovered, on the 300-foot-deep ocean floor between Finland and Sweden, "a large circle, about 60 feet in diameter. You see a lot of weird stuff in this job, but during my 18 years as a professional I have never seen anything like this. The shape is completely round."