As you learned in a previous post, I have a background in physics. And you might have also noticed that I’ve included a lot of science in my fantasy stories. In fact, if you’ve finished Rising on Song, you will know what that post image is all about 😉.

But does the science fly? If you’re a science geek and want to know, I am doing a deeper dive into some of the hidden science behind my fantasy once in a while. Here’s my first shot.

The ballista is an ancient missile weapon that...