It's not propaganda when you don't mention a tired trope that every reader already knows. The article is about things that were not previously known.

It's not a research paper. This is a newspaper and the article is news : emphasis on the 'new'.
If you're going to call something propaganda you first need to specify what it's aim is? What is it trying to convince you off that is not objectively true and backed up by solid sources?
OH right. Nothing. It states no opinion at all. Just objective reporting of hitherto unknown facts. The epitome of well done journalism.