Most Nancy Drew fans could tell you how to make invisible ink. But the CIA has still waited until now to lift the lid its 'secret writing' practices, revealed today in some of the oldest secret ...

Step into the hidden science lab in your kitchen with five easy experiments that explain refraction, surface tension, ...

Need some gifts for your kids, grandkids, nieces and nephews? More specifically, gifts they won't toss aside as soon as they open them? We've got the goods: Maleden Invisible Ink Pens. These ...

Did you know that 3 in 10 Americans have a tattoo? Having that loved one's name or image on your body may have seemed like a good idea at the time. But what if you changed your mind? Thanks to places ...

Invisible ink is one of the most popular features on Apple's iOS 10 for iPhone and iPad, but it's still a little buggy. Invisible ink is a new feature that lets you send scrambled-looking texts and ...

Apple teased the future of messaging during its Worldwide Developer Conference this week. The iOS 10 update is going to change the way you text (and sext) — and one feature in particular, invisible ...