Geoscience:Built for Destruction — Tornado
Twisters produce the fastest wind speeds on earth， a killer cone that can hit over 300 miles or almost 500 kilometres an hour. Tornadoes are as mysterious as they are deadly， a source of constant surprises. Because no one knows when will next tornado fall. This program will take us into the heart of the twister to find out how tornadoes work， what they can do， and how to survive one. Just hold on your fists， it might be a frightening trip.
- Added：2006
- Country：America
- Duration：60
- Time of update：2011/8/17 11:04:10