Art

Claude Monet's 1923 cataract surgery removed his right eye's lens, giving him a rare ability: seeing ultraviolet light, which healthy lenses filter out. Water lily flowers glow in UV. His late paintings show it — strikingly more blue and violet than anything before the surgery.

When sculptor Anish Kapoor bought exclusive artistic rights to Vantablack—the world's blackest material absorbing 99.965% of light—artist Stuart Semple sold his pigments to everyone except Kapoor. His site's cookie button reads 'I am not Anish Kapoor.'