His “ Night Blossom ” 3D-printed flower glows using radioactive tritium and will continue to glow for decades. Tritium vials are available and often show up in watches for nighttime visibility.

Hey y’all, Courtney Linder here, deputy editor at Pop Mech. If you grew up in the 80s or 90s, you probably remember those glow-in-the-dark stars we all used to paste to our ceilings as kids.

What Is Uranium Glass? According to The Glass Museum, the glow-in-the dark glassware is believed to have been invented by glassmaker Josef Riedel, who used uranium to color glassware in his ...