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Fifty years ago, atop the Marshall Mesa in Colorado, scientists carefully launched a weather balloon carrying a new instrument that could measure ozone levels from the ground to the very edge of outer space - and radio the data back to a ground receiver. What started out as a modest research project driven by scientific curiosity provided some of the first insights into how ozone, a trace gas that blocks the sun's harmful ultraviolet rays from penetrating through the stratosphere, was distributed in the atmosphere. [Source: NOAA News]
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