The Public Domain was established in the US Constitution with the Copyright Clause:
To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries.Maybe one day I will write an article on why a future copyright extension should be viewed as unconstitutional, but the Supreme Court won't rule that way when congress pass the next extension sometime before 2019. Which reminds me Lessig 2016.
Anyway here is a promo for the channel:
As always the content is ad free on my end.
Liam '15