Subject: scientific changes
Cool article. On very few occasions has science "changed its mind", and here's the reason why. Mostly happens in "young" fields" since the mid-1800s, when methodical science really got started. Sure, change happens all the time, but seldom a complete reversal in thinking (one example being the aether, cited in this article).

https://www.scientificamerican...

But that’s not how science works. Or, more precisely, it’s not how science works except in two specific, relatively unusual circumstances.