William Abel, a mail censor at Iowa's State Prison, Fort Madison, using a hot iron to bring out a secret message written in lemon juice on a letter.Three Lions/Getty Images Humans have had a long ...

Renowned photographer Platon says the day he sat with Vladimir Putin, the Russian leader relayed a darkly coded message during a playful 2007 exchange about the Beatles. The British photog (born ...

Humans have had a long history with sending secret messages. The practice dates back to ancient Greeks tattooing a servant's head to a modern-day employee stealing corporate secrets. Invisible ink is ...

Russia's mysterious shortwave radio station, often called the 'Doomsday Radio', has again caught global attention after broadcasting a large number of secret messages in a short time. The station, ...

Astronaut Salis has stunned the world with strange discovery of mystery coded message. The globally renowned first Nigerian Astronaut, Chief Owolabi Salis has astounded the world with a discovery at ...