[T]onic water glow[s] under ultraviolet... because the ... is fluorescent. ... ink is also acting as an ultraviolet detector... - Helen Czerski

I never wanted to go into filmmaking. It was just that I had the opportunity... I found the visceral nature of it very appealing... [Y]ou're in the middle of something directly experiencing it at the same time as studying it... [T]hat was really interesting to me.

[M]ost of the south coast of England is underlain by a great layer of this calcium carbonate, mostly made of this one amazing organism.

[T]here are these very famous images in of s swimming, and they've always got these trailing bubbles. ...[N]o one really thought about it until a few years ago at the University of Bangor, a couple of fluid dynamicists... had a bit of think, and it turns out that what the penguins do is really... cool! ...They are constantly preening. The feathers are the most important thing a penguin has because they are its insulation and they are a large part of how hydrodynamic it is. How easy it swims through the water. ...Before the penguin goes down to dive, and they can be quite long dives, the penguins all fluff up their feathers and trap gas... bubbles underneath.