[AlecSchueler]

> how many similar things have happened in the past but nobody noticed because nobody was looking or even knew how to track such a thing

We can actually make petty good estimates because of things like carbon layers in the ice. It's happened in the past, you're right, and usually it precedes large scale extinction events.

[luxuryballs]

so because a current in the ocean is changing we should tell everyone they might be about to die or what’s the goal here

[AlecSchueler]

The "goal" of science is understanding. I'm not sure what your issue with it is.