"Animaux Longévité." . . "Science." . . "Mai qi ni ke fu." . . "麦奇尼可夫." . "Vieillissement." . . "Longevità e salute." . . "Wissenschaft." . . "Lebenserwartung." . . "Vells Condicions socials." . . . . "Envelliment." . . "Décès Causes." . . "Mort." . . "MEDICAL Reproductive Medicine & Technology." . . "Longévité" . . "Longévité." . "Médecine." . . "Longevity physiology." . . "Life Expectancy." . . "Life expectancy." . "Vejez estudios y conferencias." . . "Evolution." . . "Geriatrics." . . "Longevidad." . . "Medicine." . . "Chang sheng fa." . . "長生法." . "Diet Therapy." . . "Aging." . . "Aging" . "Old age." . . "Old age" . "Anziani Psicologia." . . "Intestines microbiology." . . "Biology (General)" . . "Vellesa." . . "Aged." . . "Longevidad estudios y conferencias." . . "Vieillesse." . . "Longevity." . . "Longevity" . "Hygiene." . . "Antropologia filosòfica." . . "Vita umana Durata Problemi." . . "Rejuvenation." . . "Rejuvenation" . "Optimismus." . . "Salute e longevità." . . "Scienza e morale." . . "Ottimismo e salute fisica." . . "Personnes âgées Conditions sociales." . . "Pessimismo e salute fisica." . . "Ethik." . . "Longevitat." . . "Rejuvenecimiento." . . . . . "Miscellanea" . "Miscellanea"@en . "Ėtjudy optimizma" . . . . . . . . . . . . . . . "Chang sheng lun" . . . . . . . . . "\"Three chief evils that hang over us are disease, old age, and death. To study and control senescence, Metchnikoff proposed the establishment of a new scientific discipline he named 'gerontology.' In this classic text on the prolongation of life, Metchnikoff suggests that science should be encouraged and helped in every possible way in its task of removing the diseases and habits that now prevent human life from running its normal course, and his belief is that, were the task accomplished, the great cause of pessimism would disappear. Metchnikoff was able to proclaim himself an optimist."@en . "Electronic books"@en . . . . . "The prolongation of life"@en . . . "长生论. 上" . . . . . . . . "Essais Optimistes" . . . . . "Etjudy optimizma" . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Essais optimistes" . . . . . . . . . . . . . . "Leben / Verlängerung." . . . . . . . . . . . . . . . . . . . . . . . . "Livres électroniques" . . . . "Biologie/Aufsätze." . . . "Etiudy optimizma" . . "Etjudy Optimizma" . . . . "Chʻang shêng lun" . . . . . . . . . . . . . . . . . "The prolongation of life : optimistic studies" . "The prolongation of life : optimistic studies"@en . . . . . . . . . . . . . . . . . "Chang sheng lun. shang" . . "The prolongation of life optimistic studies"@en . "The prolongation of life optimistic studies" . . . . . . . "°Etjudy optimizma" . . . . . . . . . . . "The prolongation of life; optimistic studies"@en . "The prolongation of life; optimistic studies" . . . . . "長生論" . "Ben shu zuo zhe ren wei, mu qian ren de qu shi, da duo yin wei ji bing, bing fei zi ran si wang. zuo zhe cong ren ti zu zhi, ren ti bing li, yi ji ren de xin li, qing xu, ai qing deng fang mian tan tao le ying xiang ren lei shou ming de ge zhong yin su." . . . . . "The prolongation of life. Optimistic studies"@en . . . "Ėti︠u︡dy optimizma" . . "Etiudy optimisma" . "The Prolongation of life : optimistic studies" . . . . . . "The Prolongation of Life Optimistic Studies"@en . . . "Psychologie/Optimismus/Pessimismus." . . . . . . "Lebensdauer." . . . . . . . . . "homme (être humain) nature (philosophie)" . . "Older people Social conditions." . . "Older people Social conditions" .