Today I had a tutorial for my final major project about space and underwater, and Ian recommended I take a look at this film made by Charles and Ray Eames from 1977, that illustrates the respective size of everything, from the outer reaches of the universe, right down to the proton, zooming in and out by a power of ten every ten seconds. That might sound a bit confusing but give it a watch and you'll understand. Also check out the website The Scale of the Universe 2, which is an updated version of this idea, navigable by scrolling in and out on your mouse.
It's really interesting to watch and see just how big the universe is and how insignificant the proton seems in comparison. In terms of my project it's interesting to see how visually some of the huge space situated imagery; galaxies, planets etc., look quite similar to some of the microscopic cells and atoms, for example, so there are some nice links there between space and underwater creatures/organisms that I can look into more.