It all started when we discovered that the Earth's crust was actually sentient... just kidding, it's just a bunch of rocks.
But seriously, the sea floor is a pretty cool place. It's like the Earth's crust is one big, giant, geologically-active teenager.
We've got our sea mounts, our mid-ocean ridges, and our oceanic crustal plates all vying for attention.
It's like one big, happy, geological family, except when they're not.