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

The blackest of all blacks.

Is a black hole invisible? - Quora

A supermassive black hole now faces Earth: scientists

This Manmade Material Is Nearly as Dark as a Black Hole

Black - Wikipedia

A Visual Guide to Vantablack, the Darkest Substance Ever Made » TwistedSifter

Surprising Dark Matter Theory Explains Mysterious, Supermassive Black Holes That Formed Early in the Universe

Vantablack, the blackest material ever made

Developing the Darkest Coating in the World – Current Happenings Across STEM Magazine

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

Their Dark Materials - 99% Invisible

First detection of light from behind a black hole

Black holes may be the source of mysterious dark energy