Perhaps there's still something to vitalism: http://en.wikipedia.org/wiki/Hans_Driesch#Experiments_in_embryology http://en.wikipedia.org/wiki/Hans_Driesch#Expe

Perhaps there's still something to vitalism: http://en.wikipedia.org/wiki/Hans_Driesch#Experiments_in_embryology http://en.wikipedia.org/wiki/Hans_Driesch#Experiments_in_emb... Experiment showing that irregardless of sea-urchin embryo part grown, it still developed into a full sea-urchin. Hans Driersch thought this evidence of some kind of vitalism in nature.