By 1908, the triple dot-dash-dot code became the official international radio distress signal and remained that way until 1999, when Morse code was declared all but dead. While the original SOS ...

The distress signal CQD originated from the signal CQ, expressing "seeking you," or "all stations." The signal CQ was commonly used among wireless operators -- and land-based telegraphers before ...

The electrochemical sensor attaches directly to live plant leaves and monitors hydrogen peroxide, a key distress signal. Pests, drought, extreme temperatures and infections all cause stress in plants.

MOSCOW, August 27. /TASS/. A plane heading from Moscow to Mineralnye Vody landed safely in Volgograd after sending a distress signal, a representative of Russia’s air traffic control services ...