International Polar Year 2007-2009 Souvenir Sheet Mint NH Solomon Islands Cats Domestics Animals Souvenir Sheet The majority of steam locomotives

The majority of steam locomotives were retired from regular service by the 1980s

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sharks have diversified into over 500 species

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International Polar Year 2007-2009 Souvenir Sheet Mint NH Solomon Islands Cats Domestics Animals Souvenir Sheet The majority of steam locomotivesComoros International Polar Year 2007 2009 Souvenir Sheet Mint NH The International Polar Years (IPY) are collaborative, international efforts with intensive research foci on the polar regions. Karl Weyprecht, an Austro Hungarian naval officer, motivated the endeavor in 1875, but died before it first occurred in 18821883. Fifty years later (19321933) a second IPY took place. The International Geophysical Year was inspired by the IPY and was organized