‘The most common response I get when I talk about dark matter is: “isn’t this just something physicists made up to make the math work out?”
The answer to that might surprise you: yes! In fact, everything in physics is made up to make the math work out.’

My latest for BBC Science Focus:

https://www.sciencefocus.com/news/everything-physics-made-up/

Yes, everything in physics is completely made up – that’s the whole point

A physicist's task is to constantly create equations that keep up with our observations of physical phenomena.

BBC Science Focus Magazine
@AstroKatie This is exactly what I want in a brief article - "Here's what we know at this point, and here's what we don't know - and why". Thank you!
@drewherzig Thanks!