Alexander von Humboldt's journey through the Americas is one of the most important expeditions in scientific history. What an amazing scholar he was... Source: https://t.co/1gru8HkReR pic.twitter.com/hRXPYmsi5D
— Simon Kuestenmacher (@simongerman600) February 3, 2019
via Twitter https://twitter.com/simongerman600
February 03, 2019 at 11:40PM
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