About copyright status. In general, how copyrights are handled varies from nation to nation. There is an international convention that countries have recently agreed to that bears on this issue.
Copyrights have a limited lifetime.
An author may assign a copyright to another person or entity. Something does not have to marked as copyrighted in order for the author to be able to assert a copyright. In general, authors who assert a copyright over their products have an initial copyright. That is why the copyright status from the Die Welt and Scandinava Today photo archives is unclear. That is one of the reason why both Disney and Levi-Strauss vigorously defend their copyrights.