Dr. Kate Diomede, social media editor at Thorax, is joined by Dr. Sam Janes (1) to discuss the history of lung cancer screening, and its use in early detection. They also examine the process and results of his recent paper, "Growing small solid nodules in lung cancer screening: safety and efficacy of a 200 mm3 minimum size threshold for multidisciplinary team referral". The paper is available online: https://thorax.bmj.com/content/78/2/202 (1) Lungs for Living Research Centre, UCL Respiratory, University College London, UK. Please engage in the conversation through the social media channels (Twitter - @ThoraxBMJ; Facebook - @Thorax.BMJ · Pulmonologist) and subscribe on your preferred platform, to get the latest episodes directly on your device each month.