Cleopatra's palace in Alexandria, Egypt was discovered in 1997 by underwater archaeologists using modern technology such as sonar and divers. The remains of the palace were located in the harbor of Alexandria submerged underwater. Excavations revealed various artifacts and structures that provided insights into the opulence and grandeur of Cleopatra's reign.
Divers explore underwater.
There are many items underwater that are found in many places.
Sound travels faster underwater, but this does not mean that divers hear better underwater. It just means that the sound is heard more quickly.
I have seen this in tv. Some divers were underwater for about 3 minutes. I think it takes a life to achieve that.
Atlantis
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about 200 ft.
Shanda pihhilips
Self Contained Underwater Breathing Apparatus
So that they may breath underwater.
They don't breathe normally on their own.They have to use pressure regulators to breathe naturally, overcoming the extreme pressure deep underwater.A snorkel and oxygen tank help the divers breathe when they are underwater.