There is a spot in the ocean where the planet's biggest climate trend seems to break down.
Pretty much the whole world has warmed since the pre-industrial era, but not this spot.
Scientists call it the Cold Blob or the North Atlantic Warming Hole.
And the question is, what's causing it?
Why has this spot escaped global warming?
Well, the leading theory is that it's a bad thing, that it's a sign that we humans might be changing how the ocean moves.
"Ocean currents in the Atlantic may be on course to collapsing." What happens if those currents do collapse?
And how likely is that?
To understand what's causing the cold blob and how bad this could get, we're going to visit the sites of seven key discoveries that unlocked the secrets of the ocean.
It'll take us 12 Eiffel Towers down below the surface, and when we get back, you probably won't look at the ocean the same way again.
