"In the evenings, when the sky denotes rain, the air resounds with the monotonous howling of the alouate apes, which resembles the distant sound of wind when it shakes the forest. Yet amid these strange sounds, these wild forms of plants, and these prodigies of new world, nature everywhere speaks to man in a voice familiar to him."

-Alexander von Humboldt, from Personal Narrative of Travels to the Equinoctial Regions of America
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