We could proceed ad infinitum, magnifying ever further, but we don't want to give you the spleen. So just how tiny have we gotten, at a magnification of 250,000,000x? Well, if our Big Flea was an actual flea, you are now looking at something smaller than an atom of carbon within that flea. Or, if what appears here is our actual flea, then our Big Flea is about the size of Switzerland. That's one Brobdingnagian flea, eh, Mr. Swift?