A new study has shed light on the sun's impact on the Earth's climate, confounding current thinking about solar cycles and how they influence temperatures on Earth.
Previously scientists had thought that radiation reaching the Earth rises and falls in line with the Sun's activity, which during the 11-year solar cycle goes though periods of low and high activity.
But research by Imperial College, London and the University of Colorado in the U.S. examining solar radiation levels from 2004 to 2007 -- a period of declining solar activity -- revealed that levels of visible radiation reaching the Earth actually increased during the period.
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