Jim Sanborn is auctioning off the solution to Kryptos, the puzzle he sculpted for the intelligence agency’s headquarters. Two fans of the work then discovered the key. By John Schwartz John Schwartz, ...

Over the last 100 years, experts from across the spectrum – archaeologists, linguists, epigraphists, engineers, civil servants, cryptographers, historians, and scientists – have made several failed ...

Despite the best efforts of law enforcement officers and amateur internet sleuths, there are still many unidentified serial killers. But two anonymous murderers stand head and shoulders above the rest ...

Ten years ago, an archaeological curator by the name of Sara Rivers-Cofield bought a bronze Victorian-era silk dress at a shop in Maine. Upon turning the skirt inside out, she discovered a hidden ...

In a world where digital communication has become the norm, there’s something undeniably appealing about sending and receiving handwritten secret notes. Whether you’re sharing surprise love letters, ...

Scientists have created an unconditionally secure quantum-digital payment system using single photons to prevent fraud and unauthorized duplication. A successful test in Vienna marks a major step ...

Non-flowering have evolved long before the flowering plants and have been around for millions of years. But what are some examples of these “non-flowering” plants, and how exactly do they reproduce ...