Wow! It's amazing how little it seems we've explored of the deep ocean, whenever I hear about it. A whole other world down there, lying in wait... the frontiers of our own planet have yet to be conquered!
There's so many kinds of microbe we don't have catalogued. The last 30-40 years have been pretty astonishing in that regard.
Conquered
I think we should be doing less conquering of the planet we live on.
s/conquered/experienced/
Or
s/conquered/discovered/
...
Indeed. Until around 2021 or so, more people had been to the moon than to the bottom of the ocean (Challenger Deep).
https://en.wikipedia.org/wiki/Challenger_Deep