English example sentences with "undiscovered"

Christopher Columbus's secret love letters to Queen Isabella - undiscovered for centuries - have been rumored to rival, if not surpass, the Kama Sutra.
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While still an undergraduate, Adams performed an investigation to try to explain the reason for the irregularities in the motion of the planet Uranus. He theorized that the unexpected planetary orbit could be due to the presence of an as yet undiscovered planet.
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I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.
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In the year 2050, the feces of undiscovered aboriginal tribes will be the most valuable resource in the world.
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Again and again in cases of the most varying sorts—forgery cases, robberies, murders—I have felt the presence of this force, and I have deduced its action in many of those undiscovered crimes in which I have not been personally consulted.
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For years past I have continually been conscious of some power behind the malefactor, some deep organising power which forever stands in the way of the law, and throws its shield over the wrong-doer. Again and again in cases of the most varying sorts--forgery cases, robberies, murders--I have felt the presence of this force, and I have deduced its action in many of those undiscovered crimes in which I have not been personally consulted. For years I have endeavoured to break through the veil which shrouded it, and at last the time came when I seized my thread and followed it, until it led me, after a thousand cunning windings, to ex-Professor Moriarty of mathematical celebrity.
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It is thought that Algeria still has lots of undiscovered oil resources.
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Ziri wanted to explore the undiscovered areas of the Amazon with Rima.
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Is it possible that an enormous underground city exists, as yet undiscovered by anyone?
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Is it possible that there exists an enormous underground city, as yet undiscovered by anyone?
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