What is an unbreakable piece of matter called?
Could you elaborate on the concept of an "unbreakable piece of matter"? Is there truly such a thing in the realm of physics and materials science? And if so, what is the terminology used to describe this remarkable substance? I'm curious about the properties that would make a material unbreakable, and how such a material might be utilized in various fields, including but not limited to cryptography, finance, and the development of cryptocurrencies. Could you provide a concise yet informative explanation of this fascinating topic?