Stuck on what to write for Secret Santa? From office-safe notes to warm wishes for friends, here are easy, thoughtful ...

A Hillhouse student’s eyes widened as he applied grape juice and heat to what appeared to be a blank piece of paper — but instead held a secret message in invisible ink, written as part of a course ...

I ain’t afraid of no ghosts–unless it’s the spirits of unregulated capitalism, risky financial behavior, and criminally low wages. When Ghostbusters debuted 40 years ago, its blend of comedy, action, ...

Have you ever wanted to send a secret message to a friend that no one else can read? Invisible inks can help you do that! When you use an invisible ink to write a message, it quickly disappears. The ...