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Landslide
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Pod
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Double blind trial
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Thermocline
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Nicolaier bacillus
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Authorisation certificate
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Cervical smear
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Tax credit
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Shell
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Histidine
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Pheromone
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Excoriation
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Angular size
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Crenellation
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Stephan's quintet
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Razorback
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Cathartic
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Aneurysm
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Mass storage
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Tectosilicates
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Kepler's second law
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To graze
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Latent
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Oral contraceptive
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Coordination number
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Palm
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Sperm whale
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Bronchitis
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Free radical
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Downy birch
ELT
Extremely Large Telescopes (ELT) are telescopes with gigantic mirrors from 20 to 40m in diameter. They do not exist yet but are the subject of feasibility studies.
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