Your phone sends out invisible energy called radio waves. A transmitter inside your phone uses those waves to send me your message. It changes the radio waves – like how tall or fast the wave is – to ...

Information could potentially be stored in ice for millennia, simply by making subtle changes to the shape and position of internal bubbles, which can then be converted into binary or Morse codes.

Analog computing uses continuous signals rather than binary code, making it capable of solving problems that push digital systems to their limits.

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