Britannica Educational Publishing 
Philosophy of Science [PDF ebook] 

The scientific discoveries of ancient philosophers such as Aristotle were considered to be in the realm of "natural philosophy." Today philosophy and science are considered separate disciplines, yet each illuminates and complements the other. Modern philosophers are apt to pose important questions about the logic behind and validity of scientific practices. This comprehensive volume explains how and why philosophical thought is applied to the natural sciences and challenges readers to think in different ways about scientific inquiry.