Drilling a sample (IMAGE)

University of Helsinki

Drilling a sample

Caption

The trees of Lapland are a unique natural archive for investigating the past behaviour of the Sun. Markku Oinonen is drilling a sample containing interesting information on events in the 19th century. (Photo: Joonas Uusitalo)

Credit

Joonas Uusitalo

Usage Restrictions

copyright: Joonas Uusitalo

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