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Key
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Parotic
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Galaxy
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Subsidence
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Intravenous
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Plasticity
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MIDI file
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Walking bus
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SARS
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Aqua
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Quinolone
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Combined pill
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Amylopectin
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Dose
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Markings
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Generalised epilepsy
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Hydraulic energy
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Achondrite
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Cathode
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Corrosion
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PlayStation 3
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Karstology
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Echolocation
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Low-water mark
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Microdiorite
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Cryoturbation
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Hereditary disease
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Slip face
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Google AdSense
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McNaught's comet
Senescence
Senescence is the process of biological ageing which occurs following irreversible changes in an organism, leading to death.
It is a physiological process that begins after the maturity phase and results in inevitable progressive deterioration of vital functions: reproduction, motility, immune system, etc.
Senescence can be clearly seen in this old tree. © Matthieu Luna CC by-nc-nd 2.0
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