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| | * '''16''' - Jean-François Champollion, can speak a dozen languages and delivers a paper on the Coptic language to the Grenoble Academy. By 20, he can speak another 13 languages and at 32 he deciphers the [[Rosetta Stone]]. | | * '''16''' - Jean-François Champollion, can speak a dozen languages and delivers a paper on the Coptic language to the Grenoble Academy. By 20, he can speak another 13 languages and at 32 he deciphers the [[Rosetta Stone]]. |
| | * '''16''' - Boy sailor Jack Cornwall, of HMS Chester, is awarded a [[posthumous]] [[VC]] for gallantry at the [[Battle of Jutland]] | | * '''16''' - Boy sailor Jack Cornwall, of HMS Chester, is awarded a [[posthumous]] [[VC]] for gallantry at the [[Battle of Jutland]] |
| − | * '''18''' - [[Mary Shelley]] writes Frankenstein (The Modern Prometheus) - it is only published when she is 21, however. | + | * '''18''' - [[Mary Shelley]] writes Frankenstein (The Modern Prometheus), later published when she was 21. |
| | * '''19''' - Captain Albert Ball, [[VC]], MC, DSO & 2 bars, commences his career as a fighter pilot. By the time he is killed, aged 20, in 1917, he has become one of the [[First World War]]'s greatest air aces, accounting for at least 44 [[German]] aircraft. | | * '''19''' - Captain Albert Ball, [[VC]], MC, DSO & 2 bars, commences his career as a fighter pilot. By the time he is killed, aged 20, in 1917, he has become one of the [[First World War]]'s greatest air aces, accounting for at least 44 [[German]] aircraft. |
| | * '''19''' - was the average age of front-line [[US]] service personnel fighting to defend democracy in [[Indochina]] during the [[Vietnam War]] | | * '''19''' - was the average age of front-line [[US]] service personnel fighting to defend democracy in [[Indochina]] during the [[Vietnam War]] |
| | + | * '''19''' - [[Evariste Galois]] develops [[group theory]], and wrote it out completely on the eve of his death at age 20; it took old [[mathematicians] a century to comprehend it |
| | * '''20''' - Carl Friedrich Gauss makes his first mathematical discoveries, which will lead to the completion of "Disquisitiones Arithmeticae", his magnum opus, at the age of 21. | | * '''20''' - Carl Friedrich Gauss makes his first mathematical discoveries, which will lead to the completion of "Disquisitiones Arithmeticae", his magnum opus, at the age of 21. |
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