Assigning certain sizes, shapes and positions of bubbles to characters within Morse and binary codes means messages could be ...

Inspired by naturally occurring air bubbles in glaciers, researchers have developed a method to encode messages in ice.

[Konstantinos] wrote in to tell us about his CDW project: a digital encoding scheme for ham radio that uses CW (continuous wave) Morse code for digital data transfer. [Link updated 1/5/16] CW opera… ...