The Earth Optimism Summit is a gathering of pioneering scientists, thought leaders, practitioners and civic visionaries. It explores the boldest experiments and most innovative community practices aimed at preserving biodiversity and addressing climate change. Organiser, Dr Nancy Knowlton, explains why scientists have recognised that doom and gloom won’t save the day. Plus, we meet Dr Elise Bialylew, the founder of the global Mindful in May meditation movement.