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 ...

History, as we often encounter it, can seem like a collection of established facts and grand pronouncements. Yet, the most profound insights into the past often lie not just in the words on a page, ...

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 ...

Baskin-Robbins is known for its ice cream, but did you know there’s a hidden message in its logo? “The ‘BR’ in the Baskin-Robbins logo has a—not very well—hidden ‘31’ in it,” says Jaclyn Hesse, ...

Last Updated on September 4, 2025 by Matt Staff Logos are everywhere, but how often do we really look at them? What seems like a simple design is often packed with subtle details, clever symbolism, ...