Season 4, Episode 4 The Sunspot Mystery
First Aired: February 2, 1977
"The Sunspot Mystery" examines the way storms on the sun may affect the earth's weather. Noting that sunspots seem to follow 11-year cycles, the report traces scientists' efforts to link these to droughts in the Midwest. One theory examined states that a lack of sunspot activity from 1645 to 1715 caused the earth to cool considerably.
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- Premiered: March 3, 1974
- Rating: None
- Premise: PBS's premier science-documentary series, which has won six Peabody Awards and more than 20 Emmys (four in 2002 alone) since its 1974 debut. `Nova' clearly, and often engagingly, `demystifies' a vast range of science, technology and history topics---past a… (more)