I’m not sure what you mean, is string theory not part of physics? But yeah she said she has a list of things to go through, more dot points than a script. Her normal videos are typically scripted though.

I got real excited for a second. Why must they tease us so

She made a comment about it early on. I think it’s to distract her a little so she doesn’t just spend the next hour talking in detail about maths.

It’s quite thick, 2mm. There are specific leather needles which you absolutely need, probably a good idea to use thicker nylon thread instead of cotton, and the longest stitch length. Also I had to use this stepper foot, the teeth couldn’t grip the leather to move it otherwise. All in all it’s stretching the limits of what a household sewing machine can do, one of my machines just couldn’t do it at all, didn’t have the oomph