How has the role of stamps changed with the advent of digital communication, and what is the future of stamp collecting in the digital age?
What factors can affect the value of a stamp for collectors, and how can one determine if a stamp is rare or valuable?
How do different countries design and issue stamps, and what are some notable themes or series that have been released over the years?
What is the history and origin of postage stamps, and how did they revolutionize the postal system?
