- 志仁Lv 61 decade agoFavorite Answer
Scientists are exploring the sea, but you seldom got it from news.
It is more easy to observe the universe than sea, beside sending rocket up to sky, you can simply look up the sky to think.
While exploring the the world underwater, you need to overcome lots of problems. The main problem is the water pressure. Even 10m deep water will increase 1 atm (atmoshere pressure ~ 10000Pa), if you are 2000m deep, than you need to overcome 200 atm, while spaceship just need to overcome 1 atm. A lost power submarine will be easily destroy by the water pressure.