Surely in a minority, but I do see posts from people on HN that are scientists, researchers, even mechanics and such. We definitely get a lot of speculation, but I've learned never to underestimate the level of expertise of people in our community.

Then please link the best ones? Or write some of your high-level thoughts about it.

You don't need to be an expert to be curious. Many here would surely like to know more. That's why non-IT stories are upvoted in the first place.