Basic reasons for exploration were industrial revolution, intellectual movement, reformation and expansion of missionary works,
Both dates occurred after two world wars, the 1920s preceded the World War 1 while the 1950s preceded World War 2.
The mass media similarity between these two is that it focused more on entertainment and advertisements. Because the war ceased already, films and entertainment shows flourished greatly.
16) California
17) Because they can act like it's not drugs and hide it.
