Scott Alexander conducts an experiment playing a word game 800 times under varying CO2 levels, finding no correlation between indoor carbon dioxide and cognitive performance.

Scott Alexander reports on a survey about nighttime ventilation interventions, finding modest overall improvements but some individual success stories.

Scott Alexander explores research on how high indoor CO2 levels may impair cognition and sleep, suggesting simple solutions like better ventilation.

Scott presents a case of postpartum panic attacks, explains the theory of panic as a false suffocation alarm, and discusses how understanding this mechanism can help treat the condition.

Scott examines the relationship between altitude and obesity, then explores and ultimately dismisses the theory that increased atmospheric CO2 could be causing the obesity epidemic.