Tornadoes in 2011 Set Deadly Records
Many of us may remember the jaw-dropping images of the May 22, 2011, tornado that tore through Joplin, Mo., killing 158 people and leaving an incredible 14-mile path of destruction. But that system was only one of the record-breaking tornado events... [More...]

Scientists have known for decades that hidden under those impressive vistas at sites such as 














