MAN, — THE ANIMAL 7 



mental analysis of protoplasm have been solved — 

 many remain as obscure as when man first recog- 

 nized their existence. With all of the progress 

 of science, we are unable to state how life began. 

 True, there are hypotheses about this important 

 question but not one of them has been proved. 

 The biologist starts with life as it now exists just 

 as the physicist starts with energy and the chemist 

 with atoms and molecules in all of their infinite 

 complexity. They do not try to explain energy, 

 and oxygen or carbon but rather try to discover 

 how these inanimate substances act under varied 

 conditions, and when this has been fully done help 

 man to anticipate and take advantage of these 

 natural laws. As we recognize more of the laws 

 of life and make them a part of our everyday 

 existence, our progress is more certain, and our 

 efforts are more likely to meet success. 



One more illustration concerning a second type 

 of problem that still remains unexplained will en- 

 able the reader to eliminate this and similar prob- 

 lems from consideration until man discovers some 

 way of solving them. Palaeontological studies, in 

 the caves of Spain and France in particular, have 

 revealed that there were distinct races of men that 

 once inhabited these regions long before historic 

 man was known to exist. Here are found the re- 

 mains of such races as the Grimaldl, Pro-Magnon 

 and BriJnn with which we are gradually becoming 



