Doucet, an inventor, discovered that the inside temperature of a house painted black was on average 7 degrees Fahrenheit warmer than a white one. In summer, the white model house was 12 degrees Fahrenheit cooler. Now he has invented a paint that changes color via a thermochromic response, which refers to how chains of liquid crystals react to atmospheric temperature causing the color to change. Doucet developed a kind of thermochromic pigment containing the crystals and started experimenting with a tin of ordinary house paint and different additives. The result was a substance that could change color by absorbing ultraviolet light (which produces heat) above a certain temperature. (CNN)

6/10/2025