Anyone Who Writes About "darwin's Theory Of

It Is Curious How Often Erroneous Theories Have Had A Beneficial Effect For Particular Branches Of Science.

Our Understanding Of The World Is Achieved More Effectively By Conceptual Improvements Than By Discovery Of New Facts

Mathematics Is As Little A Science As Grammar Is A Language.

Anyone Who Writes About "darwin's Theory Of Evolutionin The Singular, Without Segregating The Theories Of Gradual Evolution, Common Descent, Speciation, And The Mechanism Of Natural Selection, Will Be Quite Unable To Discuss The Subject Competently.

Two Forms Or Species Are Sympatric, If They Occur Together, That Is If Their Areas Of Distribution Overlap Or Coincide. Two Forms (or Species) Are Allapatric, If They Do Not Occur Together, That Is If They Exclude Each Other Geographically. The Term Allopatric Is Primarily Useful In Denoting Geographic Representatives.