An ocean exploration team led by Swedish researcher Peter Lindberg has found what some are suggesting is a crashed flying saucer.
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."
Adding to the mystery at the bottom of the Gulf of Bothnia, Lindberg said he saw evidence of scars or marks disturbing the environment nearby, suggesting the object somehow moved across the ocean floor to where his team found it.
It's not clear what to make of this report, or the video of the sonar scan that shows the object, but Swedish tabloids and Internet UFO buffs have had a field day. Some suggest the object is a flying saucer of extraterrestrial origin (and the seafloor scars were dug up when it crashed), though of all the things that might create a round sonar signature, that seems to be among the more outlandish. It might be a natural feature formation, or possibly a sunken, round human-made object.