The World’s Deadliest Tornadoes | Mega Disaster | Spark

Tornados are unpredictable, volatile and lethal. They leave behind obliterated towns and bewildered scientists. Each one is unique, most are dangerous and a few are deadly. The Earth’s titanic forces can rip apart the land, homes and people’s lives. This series exposes their killer characteristics and why they can be so devastating. Subscribe to Spark for more amazing science, tech and engineering videos -