We're just a vaguely coherent temporary collection of membranes holding a puddle of water together round some selfish DNA, though. The clever stuff is all prote

We're just a vaguely coherent temporary collection of membranes holding a puddle of water together round some selfish DNA, though. The clever stuff is all protein folds and chromosomes which is going on right around that magnitude. Not coincidentally, it's also right where you find the wavelengths of visible light - because structures of that kind of size are what both our eyes, and most of the things we're interested in are made out of.