Welcome to issue #39 of Beyond Euclid, the newsletter for the best mathematics and science stuff of the week. I am Ali, and every week I curate cool articles, videos, movies, and resources to help you have a better week! Here is the good stuff for the last week of July 2022. Before I start, I want to thank members of Beyond Euclid for keeping this newsletter free for everyone to read!  Please consider supporting me by being a member just for $3 if you like this weekly newsletter! Your support will help me keep up the excellent project! You can be a member here.