Things too small, too large, too fast, or too slow for us to see
When I studied physics, chemistry, and biology more than 55 years ago, we were taught it would be impossible to ever see a virus, much less a single molecule or atom. Yet here are living, moving, working molecules of DNA. A single virus. And row after row of carbon atoms.
Did you ever want to see a snail’s tongue? Well, . . .neither did I, that I remember. But there it is. And a tiny bug riding on a bigger bug’s leg. It reminds me of the old verse about the fleas, if I could only remember it. Something like “Big fleas have little fleas upon their backs to bite ’em, And little fleas have littler fleas, and so ad infinitem.” Yeah. That sounds right. I have no idea where it came from.
Be exceedingly careful about ever saying “We will never be able to . . .”.