Proteus Technology: New Material Is Strong, Light and Non-Cuttable etc

[sman]

Proteus Technology: New Material Is Strong, Light and Non-Cuttable

Engineers have taken their inspiration from shells and grapefruits to create what they say is the first manufactured non-cuttable material.

This new material, which could be used in the security and health and safety industries, can turn back the force of a cutting tool upon itself.

The lightweight material — named Proteus after the shape-changing mythical god — is made of ceramic spheres encased in a cellular aluminum structure that in tests could not be cut by angle grinders, drills, or high-pressure water jets.

https://scitechdaily.com/proteus-technology-new-material-is-strong-light-and-non-cuttable/

Rare and hardest to crack Enigma code machine sells for $437,000

https://www.zdnet.com/article/rare-and-hardest-to-crack-enigma-code-machine-sells-for-437000/

Solving Sudoku with Graph Theory

“https://rakhman.info/blog/solving-sudoku-with-graph-theory/”