The Pacific Ocean is by far the world's largest ocean, more than five times wider than our moon. But why is the Pacific so big? Covering about 63 million square miles (163 million square ...

Photos show what looks like a line between the Atlantic and Pacific with different water colors on either side, but is there some kind of barrier or do the two oceans mix?

STANFORD, Calif. (KGO) -- An ocean-going research project we told you about last year is suddenly yielding a surprising result. Scientists believe it could signal significant changes ahead for the ...