[TaylorAlexander]

Yes this has been known for a while. However it is often important to have scientific studies backing well-known information. Well-known information is often wrong, and there are also people who are familiar with the prevalence of the knowledge but are unconvinced or misinformed. In these cases, studies help avoid confusion and advance our collective knowledge.

In this case I am sure earlier studies have been done, but I would not write off further exploration just because a topic has been previously studied.