Origin (2) société (humaine) (1) bruit (1) lac (1) changement écologique (1) écologie (1) conductivité (1) comparaison (1) climat (1) ingéniérie (1) Ecology (1) Comparison (1) Employment (1) Causes (1) Assaying (1) Correspondence (1) Fiction (1) Correspondence (1) Origin (1) Zoology (1) Worms (1) Varves (1) Stone implements (1) Social evolution (1) Records (1) Percentage (1) Ontogeny (1) Oases (1) Noise (1) Nature (1)