A Brighter Sun

— NPR's Richard Harris reports on an article in today's issue of `Science' magazine, which suggests that the sun has become brighter over the last decade. If so and if it's part of a long term trend, the reported change could partly explain why the earth has warmed in the past century. And the findings could complicate studies of global warming. The question remains, however, whether the sun has actually changed over the past decade, or whether the instruments measuring the sunlight have simply degraded over time.

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