When radium was first discovered by Marie and Pierre Curie in 1898, its glowing luminous green color inspired people to add it into toothpaste, medicine, water, food, beauty products and jewelry. It wasn’t until much later that we realized that radium’s harmful effects as a radioactive element outweighed its visual benefits. Unfortunately, radium isn’t the only pigment that historically seemed harmless or useful but turned out to be deadly. This video by TED-Ed details history’s deadliest colors.
Top image screen captured from the video.