The violet gland
The violet gland or supracaudal gland is a gland located on the upper surface of the tail of certain mammals, including European badgers and canids such as foxes, wolv
Adrenochrome
Adrenochrome is a chemical compound produced by the oxidation of adrenaline (epinephrine). It was the subject of limited research from the 1950s through to the 1970s as a po
Mauveine aka aniline purple
Mauveine, also known as aniline purple and Perkin’s mauve, was one of the first synthetic dyes. It was discovered serendipitously by William Henry Perkin in 1856 whil
Rose madder aka madder
Rose madder (also known as madder) is a red paint made from the pigment madder lake, a traditional lake pigment extracted from the common&nb