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Yellow dwarf
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Malacology
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Ribosome
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Hemicrpytophyte
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Server
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Storage memory
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Absolute zero
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Cervix
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Diastolic pressure
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Solar Impulse
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Granite
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Toslink
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ZNIEFF
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Dinosaur
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Winter solstice
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Cross-talk
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Kyphosis
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Diffraction
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Kerberos
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Azimuth
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Map projection
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Psycho-oncologist
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Refringence
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Trisomy 21
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Asphyxia
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Digestion
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Mandible
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Oligohaline water
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Nanocrystal
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SARS-CoV
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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