Avsnitt 19

Sun, wind, and rain are basic to life, but sometimes the weather is more than just that. Sometimes it's stronger, violent. The wind becomes a tornado, the rain a hurricane. The Earth's atmosphere, for a moment, makes it uninhabitable. And there's nothing we can do about extreme weather but try to predict it, prepare for it and hope that it never happens here . This DVD from the Discovery Channel looks at the innermost workings of a storm system to reveal the visible and invisible forces that drive our weather. Using the latest satellite imagery and 3D graphic animation, trade-winds, tornadoes, lightning, monsoon, and hurricanes are examined in detail. From the aurora borealis to the bizarre downpouring of fish and frogs, we learn that the earth's atmosphere is a delicate and ever-changing environment . Finally we delve into the past to discover how earth's volcanic origins helped create weather as we know it.