[T]hey came back with these two photos. One from , which was , which was the Earth rising over the surface of the moon... before they'd landed on the… - Helen Czerski

I've always studied the physics in the middle, even when I was doing my degree. ...I passed my exams in quantum mechanics and cosmology, but I knew I was never going to touch those things, but with the ocean it's something you can directly experience... I'm much more interested in the everyday world than in... s or something.

So this is brilliant, because it's this wonderful interaction of all sorts of things. It's a physical process. The reason the bubbles come out as the penguin swims up is because the pressure is decreasing, and the bubbles are expanding, so they can come out of the feathers.

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...