Antipodean comedians Kent Valentine and Sarah Bennetto run the Never Explain gauntlet this week, trying to work out who's taller - TV's Dr Brian Cox or Carl Sagan. While Steve Cross and Suze Kundu are in rare agreement over the most pointless branch of science. Sophie Scott joins us in the chair trying to keep the peace. Never Explain is science made funny, where the right answer makes you no friends and making jokes at each other's expense makes you the winner. Never Explain is produced by Elise Bramich and Steve Cross, and financially supported by the Wellcome Trust.