Some thoughts on the physics and biology of time.
D005075:Biological Evolution; D001695:Biology; D005060:Europe; D049690:History, Ancient; D049691:History, Medieval; D049711:History, Modern 1601-; D009229:Mythology; D010507:Periodicity; D010684:Philosophy / Q000266:history; D010825:Physics / Q000266:history; D012067:Religion / Q000266:history; D013223:Statistics as Topic; D013816:Thermodynamics; D013995:Time; D013998:Time Perception; D014481:United States