The jet stream that circles Earth's north pole travels west to east. But when the jet stream interacts with a Rossby wave, as shown here, the winds can wander far north and south, bringing frigid air to normally mild southern states.
Burning daylight—thought these were tornadoes, I think those are the burning oil wells in Kuwait during the Gulf War. Iraq set fire to more than 600 of them as they retreated from Kuwait during the Gulf War in 1991
A paper by NASA researchers projects that nuclear power has prevented more air pollution-related deaths than would have come from burning fossil fuels, but one of its authors stepped down from his NASA post.