A team of researchers from England and Bulgaria have found the world’s oldest known intact shipwreck. The Greek trading vessel was found lying on its side off the coast of Bulgaria. It dates back to around 400 BCE, making it more than 2,400 years old. Yet it is almost perfectly preserved. The benches where the rowers sat are still there. So are the contents of the ship’s hold. The ship is still in great condition for two reasons. It was found more than 6,562 feet (2,000 m) down from the surface. That’s too far for modern divers. And there’s no oxygen in the water. The researchers sent a remote operated vehicle (ROV) down to look at the ancient ship.