Why Are Manchester United Called the Red Devils?

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Manchester United’s “Red Devils” nickname came from nearby Salford’s rugby league team and was adopted under manager Sir Matt Busby in the 1960s. The connection links two different sports through a shared local nickname. UEFA’s account traces Salford’s name to a French journalist who called the team “Les Diables Rouges” in 1934. That phrase means “the Red Devils.” UEFA says Busby later took a liking to the name. The Premier League’s crest history also credits him with adopting it from Salford. The nickname became a visual part of United’s identity: its badge includes a red devil holding a pitchfork below a three-masted ship. The ship has a separate origin in Manchester’s coat of arms and trading history. A single crest therefore combines a symbol of the city with a nickname borrowed from its sporting neighbourhood.  
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Who Invented the Safety Lamp?

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The safety lamp was invented by Sir Humphry Davy (1778-1829), an English scientist, in 1815. He was born and educated in

Cornwall, England. His lamp prevented the explosion of air containing methane, a gas common in coal mines. Prior to this invention, many miners lost their lives due to explosions in the mines. Davy surrounded the lamp's flame with a wire gauze. This cooled the flame and prevented it from passing through the gauze to the explosive gases. Sir Humphry Davy also discovered that nitrous oxide (laughing gas) could be used as an anesthetic. He discovered that materials could be separated into their elements by passing an electric current through them. 
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