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Why do toothpaste and cement often harden after some time left in the environment?
US and French scientists have recently discovered the mechanism behind the freezing of toothpaste or cement over time if left in the environment.
Material Hardness
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Articles about Material Hardness
2 published items.
Space science
Diamonds lose the throne 'king' hardness
Professor Tristan Ferrroir, of the University of Lyon, France, announced that his team has discovered that new matter is harder than diamond.