All of the things that go to make Heaven and Earth
If you’re old enough, you may remember the classic 1980s television series Cosmos, created and hosted by the astronomer Carl Sagan. Or, you might recall the 2014 series Cosmos, a tribute to Sagan’s work, hosted by Neil de Grasse Tyson. Both, however, stole the idea of Cosmos from Alexander von Humboldt (1769–1859). Just as Sagan and Tyson were likely the most famous scientists in America at the time their TV shows were broadcast, Humboldt was probably the most famous scientist in the world when he published his late-career magnum opus Cosmos. This landmark work of science literature was published in five volumes, the first of which, the subject of this review, came out in 1849. Humboldt’s Cosmos is an attempt to synthesize all knowledge of the natural sciences up to the mid-nineteenth century. It reads as if Humboldt wrote it for his scientific peers, but Cosmos also enjoyed an immense popular readership in its day..
Humboldt unfurls his scientific overview in a systematic fashion, beginning with the large and moving to the small. He starts by discussing “nebulae” that we now know to be other galaxies. He then examines the various components of our solar system before moving on to the Earth’s seismic and volcanic activities and its rocks and minerals. Then it’s on to oceanography and climatology before finally arriving at life in the form of plants, animals, and humans. Although Humboldt proceeds with systematic rigor, he was also notoriously prone to digressions on whatever topics interested him. The book gets off to a slow start with about a hundred pages of introductory material in which he outlines how scientists should write about nature, how he’s going to write about it, and what exactly he’s going to tell you, before he ever gets around to telling it. As an example of Humboldt’s wandering mind, even in this “general” introduction, there is a three-page footnote about the elevation of the snow line on various mountains of the world. When he finally gets to his “General Review of Natural Phenomena,” delivers it in typical nineteenth-century fashion: all in one long chapter with no breaks or subheads. Humboldt gives special extended attention to some of his “pet” interests, such as the zodiacal light (sunlight reflecting off cosmic dust). The English edition that I read from 1868 (translation by E. C. Otté) has only one appendix; it’s about prehistoric birds in New Zealand.
It’s really interesting to learn about the state of science in 1849, and how scientists and explorers of that era went about obtaining knowledge of our universe. This was before the discovery of continental drift or Charles Darwin’s theory of evolution, but such revelations are certainly foreshadowed in this work. I’ve always admired Humboldt as an explorer and a naturalist, but when reading Cosmos one can’t help but admire him as a researcher. He seems to have read everything that had been published in four or five languages, no small feat when you consider how difficult it must have been just to get one’s hands on a specific book in those days, or how much time, effort, and patience was required for correspondence with one’s scientific colleagues.
Though he had an encyclopedic mind and a voracious appetite for specifics, as evidenced by some of the trivial rabbit holes he ventures down in this book, Humboldt was science’s master generalist. He was well-versed in a multitude of scientific disciplines, and his writings emphasize how all natural phenomena are intricately connected into a cohesive and interdependent whole. In this regard, Humboldt was the founder of ecology as we know it. In the introduction to Cosmos, he explains that he wants to write a work that assembles precise empirical data but never loses sight of the essential beauty and wonder of nature, the emotional effect so important to the Romantic movement. As far as imparting the beauty and sublimity of nature is concerned, Humboldt was more successful with his earlier work Views of Nature. Cosmos, on the other hand, reads more like a relentless torrent of data, but it’s a fascinating torrent to mentally bathe oneself in. Reading Cosmos is like living vicariously through a golden age of natural science, as if you were one of Humboldt’s associates. It’s a difficult read, not for everybody, but if you enjoy science history, a trek through Volume I of Cosmos is an inspiring and enlightening experience.






















