. Why is the ocean considered the last frontier on Earth?

Question

. Why is the ocean considered the last frontier on Earth?

Answer 1

Only a small part of the words oceans have been explored.

Answer 2

Yesterday, I heard Minnesota was the last frontier and this morning they said it was Alaska...It seems to me, its a matte of opinion

Answer 3

Because traveling to the bottom of the ocean is so hard. It's in some ways even harder than going out into space. Number 1 there's water pressure and if you don't get a transportation device hard enough you would get crushed. And because its so dark. It takes the most powerful light projectors to even see down there. Another thing is the below freezing temperatures. Add all those up and you've got a almost impossible place to travel until our modern technologies. And even now its still not fully discovered.