Explosions in coal mines caused by methane being ignited by a naked flame led to many deaths.
Scientist and member of the Royal Institution, Sir Humphrey Davy discovered that a flame enclosed by a fine mesh was safe and he demonstrated his 'safety lamp' to the Royal Society in 1815.
Ironically deaths increased after the lamps' introduction due to the meshes becoming damaged, but a modified version became a great life saver.
More recently the Olympic Flame was transported in one.
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