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Who accompanied Alexander von Humboldt on his expedition to Central and South America?

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Alexander von Humboldt was accompanied on his expedition to Central and South America by the French botanist Aimé Bonpland.

Humboldt and Bonpland met in Paris and set sail together in the summer of 1799. Over the course of five years, they traveled more than 6,000 miles, conducting extensive scientific research across the region, including explorations of the Orinoco River and the Andes mountains.1