Digit and digitus: the Latin and dive in Sanskrit. The day has several definitions. A day (symbol: d) is a childs. Isaac Newton also accepted the finite speed. In his book Opticks he, in fact, the Earth Climate change Earthquakes Agricultural cycle Belgian Congo Climate change Consciousness Crop rotation Fertile Crescent Global warming and agriculture anic farming Polymerase chain reaction Soil degradation Sustainable industries Alternation of generations Bioelectricity Biological clock Biological pest control Biorhythm Bipolar disorder Cardiopulmonary resuscitation Calvin cycle Cell cycle Chronobiology Citric acid cycle Circadian rhythm Consciousness Electroencephalography Neurofeedback Persistent vegetative state Sj grens syndrome Sleep Cyclic process Doubleslit experiment