[PlzSnow]

It actually boggles the mind that a 12-pixel image has more combinations than atoms in the universe (!!!).

[kruczek]

Well, I think the example with 12-pixel image is a bit misleading, because the picture focuses reader's attention on those 12 pixels, while skipping over the fact that each pixel can have ~17 million colors. More appropriate representation would be a cuboid made of 3x4x24 blocks.

[SapphireSun]

As a rule of thumb, it looks like 59! is about the number of atoms in the universe.

59! =~ 1.38 × 10^80