About: http://webisa.webdatacommons.org/114797852

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Harvard University Press: Cambridge MA, 1975, pp.489-490] Darwin chose it for this passage because he wanted to contrast the flux of organic development with the fixity of such physical laws as gravitation.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com