Smallest Piece:

Millennia ago, scientists deduced the particle nature of matter from examining such things like rocks, water, and metals. Such substances are much dissimilar from each other. Though, any given material-copper, for illustration-is the same wherever it is found. Even without doing any complex experiments, early physicists supposed that substances could only contain these constant behaviors if they were made up of exclusive types, or arrangements, of particles.

It was a long time before people start to realize how complex this business really is. Even nowadays, there are plenty of things which scientists do not know. For illustration, is there a smallest possible material particle? Or do particles stay on getting tinier as we deploy more and more powerful instruments to probe the depths of inner space? Either notion is hard to understand intuitively. When there is something which represents the smallest possible particle, why can't it be cut in half? Though, if particles can be cut into pieces forever and ever, then what is the final elementary particle? What would be the density of such a thing? Few mass divided by zero? This does not make sense! A literal and decisive answer to this puzzle stays to be found. We might never know all there is to know about matter. It might not even be possible to know everything about the matter.