112- Minimal and Significant Change
For the sake of clarification: if there is a delay in the comprehension of this notion, it is because the senses of humankind are incapable of perceiving minuscule changes in a short time. For instance, large clock hands move half the clock area in half an hour, and we can see this movement after we wait for half an hour. On the contrary, if we stare at the clock's hand, we cannot see its movement. The reason is that the clock hand movement is slow, while the accumulation of all the subtle movements become visible and apparent. If the clock is massively large, even that slow movements of the clock hand become visible.
The small changes described above are also among such instances, and the reason we cannot distinguish them is that our senses cannot perceive these variations instantly. However, as already said, even those small changes can be seen by concentrating and paying closer attention or employing proper tools and equipment.