Serifs are an interesting way to indicate a link. It was just enough to catch my eye but if I were reading on my phone I doubt the links would have been noticeable.

This article reminded me of the connection between the evolution of various caterpillars and brassicas as they developed glucosinolates to fight off the caterpillars.

I didn't realize either. I'm kind of glad, I think links in articles are an anti-pattern.