If you like Physics - and especially if you like the challenge of mathematics in physics - there is an excellently-written article in January 2019 issue of Scientific American by Matthew von Hippel. Title: "The Particle Code". All about what is called "amplitudeology": Scientists are designing new mathematical techniques for dealing with more difficult questions and finding new phenomena at the Large Hadron Collider.
What makes it so well-written is that, while being quite technical, it is understandable to those not educated in physics. They may not be able to do the actual math but the author describes things in a way that still makes what they are doing quite clear.
And, of course, if you are a physicist with a PhD in math - have fun. You might want to join the challenge.