Guest:  Dr. Casey Handmer:  Topics:  The primary topic was Casey's blog article "Starship is still not understood" at https://caseyhandmer.wordpress.com/2021/10/28/starship-is-still-not-understood.  Later in the show, we talked about his latest blog post, "Scaling carbon capture" at  https://caseyhandmer.wordpress.com/2021/11/01/scaling-carbon-capture.