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quote:Originally posted by ukmickyThere also well expensive
quote:Originally posted by gsmollinDo you mean softest solid mineral? That would usually be talc. Of course there are softer materials, such as rubbers and plastics, and you have even softer liquids and gasses. I suppose, the ultimate softest "substance" is a vacuum."F = ma, E = mc^2, and you can't push a string."
quote:Originally posted by Ray hintonif diamonds are so hard what do they cut them with ?.is there some super-tough substance out there that us commoners are not being told about.