Three years ago, the invention of Vantablack, a carbon nanotube coating that absorbs up to 99.965% of all light, made headlines, especially when artist Anish Kapoor acquired exclusive rights to its use in artworks, infuriating other artists. Now MIT scientists have discovered — by accident, they say — a carbon nanotube material that absorbs 99.99% of light. And to demonstrate, they’ve coated a $2 million yellow diamond with the stuff. (Meanwhile, BMW has made a car coated with Vantablack.) – Newsweek