Here is where we are in terms of sea exploration:

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In the Viking days there was a great leader named Mike Griffin.

He promised a big new vessel named Ares Fiv--I mean a longship.

"We might even discover a new world. But to build this--we have to change. Our former leader gave all of you individual raiders your own logs to go down streams on minor missions.
But to build my longship, I need you to give me most of those logs so I can assemble this great ship that is so much more capable."

"Me no wanna! Me keep my log."

"Me too! That longship sounds too big--we don't need it. I don't want to part with my Delta Two--I mean my own log."

"Mine! Mine!"

And that's how the Vikings didn't go anywhere...