When did the first fax machine appear?

It appeared in the 1870s.

Giải thích:

Dẫn chứng “In 1875, when Alexander Graham Bell demonstrated a fantastic new invention called the telephone, nobody was very interested in it. The first fax machine appeared at around the same time, but it was so enormous that no one wanted one - in fact, fax machine didn’t become popular for another hundred years.”