Sculpture Basics
Michelangelo called carving a way of freeing a figure already inside the stone, a view that only fits sculpture made by taking material away.
Street Art
An art form that began explicitly as illegal vandalism and has since had individual pieces sell for millions at major auction houses.
Cubism
Cubism reportedly got its name from a critic's sneer that the paintings looked like "little cubes," and the insult stuck.
Impressionism
A style so disliked by critics at launch that its name started as an insult.
Surrealism
Surrealists switched off conscious control on purpose, just to see what the unconscious would come up with.
Photography Basics
Aperture, shutter speed, and ISO trade off against each other, and that exposure triangle explains why photos come out bright, dark, or blurry.