At both ends of the scale we find no end.
Our estimate of the size of the Universe has grown as our equipment has improved. Yet we cannot find the end.
Our estimate of the size of the smallest ‘particle’ of matter has decreased as our equipment has improved. Yet we cannot find the end.
As it stands, scientifically, the Universe is infinite.
It seems strange that hydrogen is the lightest element so far, and it is so common, supposedly making up most of normal matter. That and the speed of light are the two weird limits or end points I can think of.
Freegards