https://dl.lwltv.com/subjects/437441869207633919 Dr Iain Stewart tells the story of how Earth works and how, over the course of 4.6 billion years, it came to be the remarkable place it is today. https://dl.lwltv.com/subjects/437441869207633919 https://img.lwltv.com/kfTc-rOUQEqYRrBnHvxjS-zBPSA=/144x0/images/f41ckyH0YeVXYXWA8wg7KXIZoa5.jpg 144 zh-cn 180 LWLDL RSS Generator 1.0