Each year about 1,000 tornadoes touch down in the U.S. - causing major destruction, wiping out homes, and taking lives. Now new research tells us how certain landscape features can increase the likelihood of tornadoes forming.

Originally released by American Institute of Physics, 2014. Streaming video file encoded with permission for digital streaming by Infobase on August 08, 2014.

Landscape Changes Could Spawn Tornadoes --(2:00) -- DeHart- Tornadoes -- (0:11).