When comparing the versatility of erasers, the kneaded variety wins my vote every time. Among its attributes, two stand out above the rest — pliability and tackiness. It has the consistency of putty ...

“Everyone makes mistakes,” your mom told you. “That’s why pencils have erasers.” But did she ever tell you how many different kinds of erasers there are? If you think there’s just the one—the pink ...

Your support goes further this holiday season. When you buy an annual membership or give a one-time contribution, we’ll give a membership to someone who can’t afford access. It’s a simple way for you ...

A pencil eraser (Alexis Madrigal). It's true, as Arthur C. Clarke said, that the most advanced technologies are indistinguishable from magic. It's not true, however, that the world's most magical ...