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Black Hole on Earth: The 'World's Darkest Material' That Absorbs Up To 99.965% of Visible Light

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The blackest of all blacks.

Vanta Black: Definition, Properties And Application

Astronomers Just Discovered the Closest Black Hole to Earth

If a black hole exists, how do we know that it is black? Is it because light cannot escape from it or is it spotted black? - Quora

Black Hole on Earth: The 'World's Darkest Material' That Absorbs Up To 99.965% of Visible Light

Black holes may lurk much closer to Earth than we thought: Astronomer claims 'two or three' voids could be hiding just 150 light-years away

The world's darkest black absorbs more than 99% of visible light

Vantablack

Black holes may be the source of mysterious dark energy

Watch all light disappear into this material