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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What is an Isotope?

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The elements have atoms of two or more different weights. Atoms that belong to the same element and yet have different weights are called isotopes. The isotopes of an element have the same number of protons in each of their nuclei, but a different number of neutrons. Hydrogen has three isotopes namely, protium, deuterium and tritium. Nearly all the elements, except a few like gold, manganese etc., have isotopes. The isotopes are generally stable, but some elements have unstable radioactive isotopes. Such isotopes are useful in industry and medicine.

The radiation from isotope Cobalt 60 is used to take photographs through metals and to detect cracks and other faults. Radioactive isotope scanning is used by doctors to study the working of internal organs.
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