Glow-in-the-dark stars feel like a staple of childhood. You may have stuck them to your bedroom ceiling in fifth grade and then discovered them, on a visit home decades later, still lighting up ...

Glow-in-the-dark plants bright enough to light up streets at night may sound like the stuff of science fiction or fantasy. But scientists have already made plants that emit a greenish glow. They are ...

I love glow-in-the-dark stickers. I leave them next to a sunny window for a little while. Then turn off the lights and watch them glow. I asked my friend Hergen Eilers how those stickers work. He’s a ...