PASADENA, CA: When the Mars Exploration Rovers were launched last year, The Planetary Society placed on board hidden messages as a public involvement activity in their educational Red Rover Goes to ...

An Egyptologist deciphers secret messages hidden for 3,000 years in the Luxor obelisk that millions see every day.

An anonymous bidder has won the solution to a 35-year-old puzzle for nearly $1 million. The top-secret code could be used to solve Kryptos, an infamously enigmatic sculpture containing four hidden ...

Secret messages can be hidden inside fake conversations generated by AI chatbots. The technique could give people a way to communicate online without arousing the suspicion of oppressive governments.