7 Most Bizarre Underwater Discoveries Nobody Can Explain

The remains of what marine scientists described as a "huge lost city" were discovered 36 metres underwater in the Gulf of Cambay off the coast of India back in 2002.

Relics of ancient civilisations have turned up beneath the waves countless times before, but what really surprised researchers this time is that initial estimates put the submerged ruins at around 9,500 years old.

That's thousands of years before the region was thought to contain people, so historians were at a loss to explain the discovery and were forced to reassess everything they thought they knew about the area.

Debris recovered from the site included construction material, pottery, sections of walls, beads, sculpture and even human remains, which were carbon-dated and found to predate the 4,000-year-old Harappan civilisation.