Short articles, prevailing on the channel, can be a good choice for 'Facts Professor' if they’re going to gain their audience’s sympathy with brevity. Also, there are medium-length pieces making up more than one third of all articles.
Intermediate readability level is common for 'Facts Professor' articles as it addresses the matters that demand certain level of education to be understood. Sometimes the channel gets even more difficult by issuing pieces of advanced readability level (there are just a few of them). In addition the channel contains materials of a basic readability level, making up more than a quarter of its content.
Neutral sentiment normally indicates an unbiased attitude that prevails in the channel’s articles (e.g. it may include some kind of scientific or professional materials).