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It sounds like a sci-fi plot: Hook a real brain up to artificial intelligence, and let the two talk to each other. That’s the design of a new study in the journal Cell, in which artificial intelligence networks displayed images to monkeys, and then studied how the monkey’s neurons responded to the picture. The computer network could then use that information about the brain’s responses to tweak the image, displaying a new picture that might resonate more with the monkey’s visual processing system.

In 1799, the Prussian naturalist Alexander von Humboldt embarked on the most ambitious scientific voyage of his life. On the Spanish ship Pizarro, he set sail for South America with 42 carefully chosen scientific instruments. There, he would climb volcanoes, collect countless plant and animal specimens, and eventually come to the conclusion that the natural world was a unified entity—biology, geology and meteorology all conjoining to determine what life took hold where. In the process, he also described human-induced climate change—and was perhaps the first person to do so. Author Andrea Wulf and illustrator Lillian Melcher retell the voyages of Alexander von Humboldt in a new, illustrated book that draws upon Humboldt’s own journal pages.

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