Once I understood. Once I looked at the ocean differently... I was cross. Why had no on ever told me about this? Because this is clearly the biggest … - Helen Czerski

So after the calcium has been part of the cliffs it can crumble down... It goes back into the ocean and this cycle starts all over again.

But you have to try... [T]hat's the lesson of ocean science... It was never going to be easy. If you go back to Challenger, we're now 150 years on from the Challenger expedition... something like 400 stations around the globe... That's like going around the and checking what color the paint is... on 400 dots along the ceiling... and the Sistine Chapel doesn't change every season... and people did try, and there are fundamental principles behind it all, and so it's worth it to try.

If you pour milk into your tea and give it a quick stir... liquids mix in beautiful swirling patterns... not... merging instantaneously. ...If you look down on Earth from space, you... often see... similar swirls in the clouds... where warm... and cold air waltz around... instead of mixing directly. In Britain... they form at the boundary between cold polar air... and warm tropical air... We know these swirls as depressions or s...