Planck Lengths and the Scale of the Universe

In class and on a homework assignment, we discussed the Planck length and Planck time. After looking up what these things are, I was dumbfounded since there is clearly a lot I do not understand about physics. Specifically, since a Planck length cannot be halved, how can it actually be considered a length and not something else entirely? It's clearly hard to imagine and of course impossible to observe with our own eyes. The best we can do is compare it to things we know of that are also small, whether it be a mouse, or an ant, or a cell, or a particle, or an atom. But for any of these, do we really have a good sense of their relative size? The website scaleofuniverse.com does the imagining for us, and will make you rethink what is small and what is large. It is pretty remarkable to scroll through the different items and get a better sense of what is out there in the universe and how we (and many other things) stack up against it. After viewing this, I understand better why Pluto was demoted to a dwarf planet. Here is another part of the model I enjoyed:

I think this site is worth checking out, especially if you enjoy thinking about your (in)significance in the universe. I'm kidding, but the first time I saw this I was pretty blown away. I could go on about some of the most interesting comparisons, but I'd hate to take away all the fun.