It's impossible to create a comprehensive list, but here are a couple that you should know about.
TED is a nonprofit devoted to spreading ideas, usually in the form of short, powerful talks (18 minutes or less). TED began in 1984 as a conference where Technology, Entertainment and Design converged, and today covers almost all topics — from science to business to global issues.
Otis College subscribes to this resource. What's great is that ACI selects and curates tens of thousands of social media publications. They make sure that all blogs are published/written by scholars and other professionals. Most junk is weeded out. Records include citation and abstract, as well link to the original post.
NPR NPR presents fact-based, independent journalism that examines and airs diverse perspectives. NPR's journalists strive for mastery of the narrative form, telling stories in ways that transport the audience to the places where news is happening and introducing the people affected.
New York Times You can get a few articles free each month.
Article in Forbes: 10 Journalism Brands Where You Find Real Facts Rather Than Alternative Facts
Some of these sources are included in our research databases, including ProQuest Research Library, Opposing Viewpoints in Context, and eLibrary.