Ever wondered how people hide secret messages in a plain sight?
Let me show you some awesome examples 🧵
1. In 2010, the Colombian army recorded a pop song with an encoded message to communicate with hostages held by guerillas. The song and message eventually reached hostages via radio:
“19 people rescued. You are next. Don’t lose hope.”
2. During WW2 a prisoner Alexis Casdagli produced a seemingly innocent needlework in a German prison camp. The piece hung on the walls of the camp for 4 years. The dots and dashes spell out in a morse code: