There is no such thing as “black light wavelength”—so why do black T-shirts, black crayons, and black marking pens look black? Investigate a variety of black ink markers, and find out why they look ...

Lynn Sures and Michelle Samour, authors of Radical Paper: Art and Invention with Colored Pulp. Courtesy Lynn Sures and Michelle Samour Artists have used colored paper since the late 15th Century ...

All products featured here are independently selected by our editors and writers. If you buy something through links on our site, Mashable may earn an affiliate commission. Four years ago, the ...