Alexander von Humboldt was a polymath and explorer whose genius lay in his holistic view of nature. During his five-year expedition to South America, he took thousands of precise measurements, from air pressure to the Earth’s magnetic field. He was the first to realize that nature is a complex, interconnected web of life—a concept he called 'Naturgemälde.' Humboldt was also the first to describe human-induced climate change, noticing how deforestation affected local weather. He invented 'isotherms' (lines of equal temperature) to visualize global weather patterns. His book 'Cosmos' was an attempt to describe the entire physical world in a single work. More things are named after Humboldt than any other human in history.