This episode Derek has another conversation with Jonathan Tweet, game designer, book author, and past Skepticality guest. After the success of his last book, 'Grandmother Fish', a book aimed at teaching pre-school children about Evolution, his follow up is a card game, Clades. Clades is a kids card matching game which centers around the evolutionary concept of Clades. Find out more about the new game, and maybe some updates on the status of Grandmother Fish.