Why a sailor, such as one working with Prince Henry, might or might not have attempted these voyages to Africa.

Which important contribution to texas did lawrence sullivan “sul” ross make?

What two advances did europeans borrowed from china

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.