Wikipedia:Today's second feature/October 29, 2005
Today's featured picture[edit]
Lightning is a powerful natural electrostatic discharge produced during a thunderstorm. Lightning's abrupt electric discharge is accompanied by the emission of visible light and other forms of electromagnetic radiation. The electric current passing through the discharge channels rapidly heats and expands the air into a plasma, producing acoustic shock waves (thunder) in the atmosphere.
Photo credit: Nelumadau