The Bremerhaven postmark on this pre-stamped International Polar Year envelope from Germany commemorates the MOSAiC Expedition. This was a one year expedition that turned the RV Polarstern into a drifting Arctic observatory to study effects of climate change. It involved several countries and hundreds of researchers, making it the largest Arctic expedition in history.
Hi,
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Thanks
I don't know. Someone sent it to me.
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