To make ultra-black materials that won’t weigh things down, consider the butterfly

IMAGE: The black patches on the wings of some butterflies are 10 to 100 times darker than everyday black objects. Clockwise from top left: Catonephele numilia, Parides iphidamas, Heliconius doris, Parides…
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Credit: Richard Stickney, Museum of L… [+5734 chars]Source