存著再看年 05:04 全景报导BBC Why Do Volcanic Eruptions Form Mushrooms Clouds? – Christmas Lectures with James Jackson
存著再看年 05:41 全景报导BBC How Do We Know That the Earth’s Magnetic Poles Have Flipped? – Christmas Lectures with James Jackson
存著再看年 06:05 全景报导BBC What Happens To Sunbeams On Their Journey To Earth? – Christmas Lectures with George Porter
存著再看年 02:20 全景报导BBC How We Harness the Energy of a Chain Reaction – Christmas Lectures with Eric M Rogers
全景报导BBC Demonstrating How Sound Cant Travel Through a Vacuum – Christmas Lectures with Charles Taylor
