A scientific revolution in the home began 125 years ago. The biologist Friedrich Reinitzer investigated cholesteryl benzoate, which he had extracted from carrots, under the polarizing microscope and observed the characteristic textures of cholesteric (and blue) phases. In their Essay on page 8798 ff., T. Geelhaar et. al. describe the development of liquid crystals from their discovery to their development and application in television screens and computer displays.