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Old 05-11-2016, 05:13 PM   #2711
Fuzz
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Quote:
Originally Posted by T@T View Post
We don't know every species of ocean life but we are fairly sure what type of life is down there, because of satellites we now have mapped every square km of the worlds ocean floors.

Space is more exciting IMO.
Not true.
Quote:
Many times, the satellite maps cannot display volcanic craters, underwater channels or shipwrecks. That is why we map. Only about 5% of the world’s seafloor has been mapped in some detail. Since the ocean occupies roughly 70% of the Earth’s surface, this leaves approximately 65% of the Earth (excluding dry land) unexplored. That is quite a lot of Earth left to explore!
http://schmidtocean.org/cruise-log-p...ady-mapped-it/

Sea floor is not really mapped by satellites, it's mapped by ships passing over taking soundings. You can see what is mapped here:

http://maps.ngdc.noaa.gov/viewers/geophysics/

Zoom in, you will see it is a very narrow line for each track, and the mapping reflects that.
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