Over recent years we’ve been treated to a series of fascinating advances in the world of x-ray imaging, as researchers have developed their x-ray microtomography techniques and equipment to the point ...

In a steady, stately script, an anonymous Dutch writer living around 1700 wrote a letter: “I never thought you’d be such a miserable dog,” it went. “If you’ve got something to say, just say it to my ...

Before envelopes existed, cleverly folding up a letter was a crucial privacy tactic. Only now are we learning what those techniques were, and what they reveal about cultures around the world. Imagine ...

In 1697, a man named Jacques Sennacque wrote a letter to his cousin, a French merchant named Pierre Le Pers, requesting a certified death certificate for another man named Daniel Le Pers (presumably ...

Keys: How to Use this Book -- Introduction to Letterlocking -- Building the Story of Letterlocking -- Reading Letterlocking Features -- Locking Mechanisms, Security, and Authentication -- Distinctive ...