system
Given the following post, respond as if you're commenting on Reddit:
human
Is there a smallest physical unit of time?

With the talk about the how space can be smaller than 10^-48 meters, I was wondering if there was also a limit to how small time units can be. My reasoning is based on the idea that however long it would take light to travel across this smallest distance is how long this unit of time would be, but I'm wondering if there is a smaller unit of time, it just doesn't matter to us because nothing can travel faster than light?
gpt
There are speculative theories in which space and time are discretized (i.e., there's a smallest possible unit of each), but there isn't any experimental evidence for it yet. As far as we know, space and time might well be continuous as far down as you care to go.