Portal:Science/Did you know/7

...that coloration is a property of loudspeakers that causes the speaker to continue to emit sound when an electrical signal stops?
...that light in a plasma display is created by phosphors excited by the ultraviolet radiation emitted by a plasma discharge between two flat panels of glass?
...that the Great Appalachian Storm of November 1950 led to wind gusts in excess of 100 mph/87 knots across New York, New Jersey, and New England?
...that the two human atria do not have valves at their inlets?