Radium watch dials put the idea of glowing green radioactive elements in the public consciousness, but radium doesn’t actually glow. If you want to see the glow of radiation, take a look at the blue ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to CuriousKidsUS@theconversation.com. “What is radium and why is it dangerous?” – ...