article_snippet: From the round-bodied, cylindrical single-crystals, PTB produces crystal spheres that are rounder than anything else in the world.
article_snippet: Then the definition would be lost for all time,’ PTB said.
article_snippet: In the case of the sphere, it is possible because the 3D shape is composed of a regular crystal lattice.
article_snippet: The researchers who created the sphere believe The researchers who created the sphere will have the answer in 2018.