This is an old NOVA episode about intelligent design but it has a nice explanation of the bacterial flagellum. It starts at around 1:07:00 in the video. https

This is an old NOVA episode about intelligent design but it has a nice explanation of the bacterial flagellum. It starts at around 1:07:00 in the video. https://www.youtube.com/watch?v=7HZzGXnYL5I https://www.youtube.com/watch?v=7HZzGXnYL5I