US researchers say they have made the darkest material on Earth, a substance so black it absorbs more than 99.9 per cent of light.
Made from tiny tubes of carbon standing on end, this material is almost 30 times darker than a carbon substance used by the US National Institute of Standards and Technology as the current benchmark of blackness.
And the material is close to the long-sought ideal black, which could absorb all colours of light and reflect none.
How much more black could this be? And the answer is none -- none more black.
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