It is an annual celebration of the legacy of Alexander von Humboldt, whose work in botanical geography was foundational to the field of Biogeography.
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Due to the impact of the celebrations for the 250th anniversary of his birth, (September 14, 1769 - May 6, 1859), the International Society of Biogeography organizes this day
During the week of September 14 - 19 there will be events around the world
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Check out this page for full details