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Exploring the space is man's way of discovering the nature of the universe beyond Earth .
Some Japanese submarines were used in the Indian ocean, but none had enough range to reach Europe.
Prehistoric sharks or even discover adventure
All submarines can sink. Some can return to the surface.
Almost everything in the ocean makes some type of noise. Further noise travels 5 times faster in water than it does in air and many time further. Submarines use listening devices known as passive SONAR to listen to the sounds of the ocean. It's a falicy that submarines make dangerous levels of noise. In fact a modern submarine is actually more quiet than the water that it displaces.
submarines change the behavior of some whales but they do not harm whales
slow
Submarines
Exploring, it obviously takes some money to "explore" right? So they are similar when you meet them with studies! IT COSTS LARGE AMOUNTS OF MONEY!
It depends on the real question. If meant literally, then yes, women are allowed on submarines. They can visit some submarines. If the question is, "Are women allowed to serve/work on submarines?" then it depends on the country. In the Royal Navy (UK) they are not allowed to serve at present. The United States, however, is gearing up to allow some women officers to serve aboard U.S. Navy nuclear submarines.
Submarines probably can't be seen, but we might find them with sonar, or possibly with a magnetic anomaly detector of some kind.
Most submarines now have a single nuclear reactor. Some smaller, coastal submarines have a single diesel.