New research may upend what we know about how tornadoes form
As the climate changes, twister behavior on the ground is changing too

BIRTH OF A TWISTER Radar data combined with visual observations of this tornado that struck El Reno, Okla., on May 31, 2013, are offering new clues into how such twisters are born.
Nick Nolte/Wikimedia Commons (CC BY -SA 3.0)
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