I spy, with my little eye...
I was surprised nobody (as yet) mentioned this:
The astronaut caused some controversy by claiming to be able to see railroad tracks and smoke-trails from orbit, something thought to be impossible. It took until a later Gemini flight to prove Cooper right.
If you do the calculations, Cooper shouldn't have been able to see those things. Plug in the diameter and focal length of the lens, resolution of the retina, Cooper's altitude, etc., and the conclusion is those objects are too small to make out.
Well, if you analyse it on the basis of a conventional camera, those things are too small to make out. But the human eye isn't a conventional camera. The eyes of all animals with foveal vision (that includes us) have microsaccades (small, jerky movements) when fixating on an object. The wetware in the brain is able to effectively increase the resolution of the eye by a kind of aperture synthesis. The different parts of the object either miss or hit a retinal cell during these movements and the brain stitches it all together to make a higher-resolution image.
Something we didn't even suspect happened until Cooper made his claims. And, I think, something of the sort is used in the cameras of modern mobiles to compensate for motion blur and other things.
Explanation above is greatly simplified and almost certainly wrong in the exact details. But close enough for El Reg commentards to argue over. :)