After the Periodic Table, the next graphic to complete is the sub-atomic particles. We keep finding new ones of them also.
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.