How scary it would be to see the floor suddenly collapse!

It took us over 4 billion years of evolution to get to where we are, if we think evolution has stopped we are too naive, right?
It's sad to see nature degrade under our feet and it's even more sad to know that most of earth's destruction is caused by humans.

That's why I'm so anxious to visit Antarctica one day, will it be here in the future?

Jus like you said in your header:

We walk around thinking our landscape is permanent, stable, supportive and then... whoosh!!! It disappears!