Why was the work of andreas vesalius so important to medicine a his development of a more powerful miscroscope allowed scientists to see micro organisms first time. b his studies of human circulatory system correctly identified the heart as a pump that pushed blood through out the body . c his work with ointments to prevent infection l

Nationalism led to major conflicts following world war i, especially when:

The rise of advertising in the 1920s. i am good with seeing how advertisements shape the roaring twenties and how it developed a new way of life through modern days. but i am not sure what the details of advertising in the 1920s were. if possible can you send me links (preferrably credential links) to sources that maybe show like the first company to start advertising through the radio, how advertising benefits (statistics graphs), etc.

What type of monarch was fredrick the great ?