In his first answer, Ross referred to Robert Putnam's book Bowling Alone, which is summarised on Wikipedia: https://en.wikipedia.org/wiki/Bowling_Alone
In What I Learned This Week, Ross continued his sporadic series on space-based toilet anecdotes with the news that NASA has invented a device that supports 'dual ops': https://www.theatlantic.com/science/archive/2020/10/space-toilet-nasa-women/616686/
He previously discussed NASA's list of US material on the Moon: https://history.nasa.gov/FINAL%20Catalogue%20of%20Manmade%20Material%20on%20the%20Moon.pdf (in Episode 133)
And, more recently, how astronaut pee can be used as a construction material: https://www.wired.com/story/on-the-moon-astronaut-pee-will-be-a-hot-commodity/ (in Episode 199)
Gemma mentioned the podcast "Something rhymes with purple". You can find it on most podcast streaming services, including Apple Podcasts, Spotify and acast.
Mark spoke about his video series "You are Pure Story". You can access it here: https://www.lifebooth.co.uk/free