Yes in the 2010 board game they use "trade" as a yield for research instead of science which that makes a little more sense in that game considering there's not as many science oriented buildings to build except the library and university which grant as much culture as trade. The better buildings to build for research in that game are the harbor and trading posts. It would be interesting if those buildings in the future could help along research.Sometimes, facts like this makes me thinking that, Peter's LA - international trade routes will grant Russia some extra science/culture for every technology/civic the other civ has that Russia doesn't - should be a more general game mechanic, act as a major source of science income, equally important as campus (preferably in civ 7, who knows).
It's not like the scientific advancements are all made by people who stay in the campus for the entirety of their life, many technologies were evolved through communication. The technology of gunpowder and firearm is a perfect example of this situation, and all the "Gunpowder Empires" (Timurid is one of them!) were alongside the Silk Road.
I have a feeling that Kublai Khan might get that unused ability found in the files where he receives either a free eureka or inspiration after finishing a foreign trade route for the first time as a "Silk Road" ability.