1. Education  Discuss in my forum  The Ocean   The Ocean  "The
Blue Marble" - Earth as seen from space.  Within the world's
oceans, there are many different marine habitats. But what about
the ocean as a whole? Here you can learn facts about the ocean,
how many oceans there are and why they're important.  Basic
Facts About the Ocean:  From space, Earth has been described as
a "blue marble." Know why? Because most of the Earth is covered
by ocean. In fact, almost three-quarters (71%, or 140 million
square miles) of the Earth is ocean. With such an enormous area,
there's no argument that healthy oceans are vital to a healthy
planet.  The ocean is not divided evenly between the Northern
Hemisphere and Southern Hemispheres of the Earth. The Northern
Hemisphere contains more land than ocean - 39% land versus the
19% land in the Southern Hemisphere.  How Did the Ocean Form?:
Of course, the ocean dates back long before any of us, so nobody
knows for sure how the ocean originated. But it is thought that
it came from