[psyc]

That illustrates what I'm getting at, because I can't see the similarity. When I read a comment, I can become informed about something or be challenged. When I see someone's photo of just about anything ... that's where I draw a blank. It would be a different story perhaps if I took the time to curate a follow-list that was all computer graphicists and mathematicians, but that's what I use Twitter for.

[cmehdy]

Building a list of interesting people to follow is the biggest part. Keep in mind that this is visual communication, so there will definitely be a bias towards photographers, artists, journalists.. Not everyone is able to communicate visually well either, and the format prevents long textual explanations and favours a more emotional response.

National Geographic has a few accounts (natgeo, natgeocreative..), NASA shares interesting tidbits about current missions, Magnum photography has interesting pieces of visual journalism, many unknown journalists use it to explore projects that do not always resonate with current trends in the media/their workplace.. There's decent content on Instagram, although it isn't easy to find.

[ryanwaggoner]

Informing or challenging is a tiny fraction of the different reasons to communicate.