Imagine being in the first submarine on Europa.

I desperately want to see that in my lifetime. I give high odds that there's something alive under there. Maybe just single celled organisms or simple worm-like things like what lives near vents in Earth's oceans, but anything would be mind-blowing.

Then I want to see if its biology chemically resembles ours. If it does, it means some form of panspermia is true and the idea that life originated on Earth is the last remaining geocentrism.

There is a good sci-fi flick about it:

https://en.wikipedia.org/wiki/Europa_Report

Of course for a film they made it a manned mission when IRL we would never do that, not just because it would take too long to get humans out there but because of contamination (in either direction).

And finding human remains

There are a whole bunch of creepypastas about things like the first mission to Mars finding a human skeleton in an old Soviet space suit and something written on a rock nearby.

Stuff like: "We are not allowed to leave... they will be coming..."

Or waking something up <_<

R'lyeh is in the south Pacific, go back to sleep sir.

...under "a few" to 20 kilometers of ice even.

* Richard Greenberg suggests "a few" kilometers. * Robert Pappalardo suggests ~20 kilometers.