The Reluctant Revolutionary: 15 Fascinating Facts About Charles Darwin

1. He Co-Founded a Club Dedicated to Eating Rare Animals

While studying at Cambridge, Darwin helped establish the "Glutton Club," a student society dedicated to consuming "birds and beasts unknown to the human palate." The members met weekly to feast on unusual game, including hawk, heron, and bittern. However, the club abruptly disbanded after trying to eat a stringy brown owl, which everyone found utterly revolting. This culinary curiosity was a prelude to his lifelong habit of tasting exotic specimens during his scientific travels.

2. He Popped a Live Beetle into His Mouth for Storage

Darwin was an extraordinarily passionate entomologist who would stop at nothing to collect rare insects. On one occasion, he held a rare beetle in each hand when he suddenly spotted a third prized specimen. Unwilling to let any of them escape, he popped one of the live beetles into his mouth for safekeeping. Unfortunately, the trapped insect discharged a scalding, bitter defense chemical down his throat, forcing him to spit it out and lose all three beetles in the chaos.

3. He Dropped Out of Medical School Over a Horror of Blood

Darwin's father was a wealthy doctor who pushed Charles to follow in his footsteps at the University of Edinburgh. However, young Darwin found medical lectures dreadfully boring and was traumatized by the bloody realities of 19th-century surgery. The breaking point arrived during an operation on a child performed before the advent of anesthesia. Darwin fled the operating room in horror and vowed never to return to medical school.

4. He Formally Trained to Become an Anglican Clergyman

After dropping out of medicine, Darwin's disappointed father sent him to Christ's College, Cambridge, to study theology. The goal was for Charles to become a respectable country parson in the Church of England. Darwin actually embraced this career path because it offered a comfortable income and ample free time to pursue his passion for natural history. Ironically, his ultimate scientific theories would fundamentally challenge the very religious establishment he once prepared to join.

5. He Was Hired as a Gentleman Companion, Not Ship Naturalist

Popular history often portrays Darwin as the official naturalist aboard the HMS Beagle, but his primary role was quite different. Captain Robert FitzRoy was looking for an educated "gentleman companion" of equal social standing to keep him company and prevent severe depression during the long voyage. The ship's surgeon, Robert McCormick, was initially the designated official naturalist. Darwin paid his own way on the voyage, which gave him the freedom to collect specimens and explore onshore for long stretches.

6. He Ate Many of the Exotic Animals He Discovered

Darwin's culinary adventurousness continued well beyond his university days onto the high seas. While exploring South America, he regularly dined on the exotic fauna he was supposed to be cataloging. He described armadillo meat as tasting remarkably like duck, and declared a 20-pound rodent—likely an agouti—to be the most delicious meat he had ever tasted. He even sampled giant tortoises and iguanas, turning his field expeditions into gastronomic experiments.

7. He Delayed Publishing His Theory for Two Decades

Darwin had outlined the core principles of natural selection by 1838, yet he waited until 1859 to publish On the Origin of Species. Knowing how deeply his ideas would scandalize Victorian society and the scientific community, he spent 20 years meticulously gathering supporting evidence. He was finally forced to publish when young naturalist Alfred Russel Wallace independently arrived at the same theory. To protect his priority, Darwin rushed his landmark work into print.

8. He Used a Pro-Con List to Decide Whether to Marry

When considering marriage in 1838, Darwin approached the decision with his characteristic scientific objectivity. He divided a scrap of paper into two columns labeled "Marry" and "Not Marry" to weigh his options. Pros included "constant companion," "charms of music," and "female chit-chat," while cons listed "loss of time" and "less money for books." He concluded his list with the declaration "Marry—Marry—Marry Q.E.D.," noting a wife was "better than a dog anyhow."

9. He Married His First Cousin and Feared the Genetic Consequences

Shortly after making his list, Darwin proposed to Emma Wedgwood, who happened to be his first cousin. The couple had a long, loving marriage and raised ten children together. However, as Darwin's scientific work illuminated the mechanisms of heredity, he became tormented by anxiety over their close genetic relation. After three of their children died in childhood and others suffered frequent ill health, Darwin conducted pioneering botanical studies on cross-pollination to understand the dangers of inbreeding.

10. He Suffered from a Debilitating Mystery Illness for 40 Years

For most of his adult life, Darwin was afflicted by a grueling, mysterious illness that left him bedridden for weeks at a time. His symptoms included severe abdominal pain, chronic vomiting, heart palpitations, extreme fatigue, and skin eruptions. Modern medical historians have proposed numerous diagnoses, ranging from Chagas disease contracted from bug bites in South America to severe lactose intolerance or panic disorder. Despite taking endless hydrotherapy cures, he never found a permanent recovery.

11. He Spent Eight Years Becoming the World Expert on Barnacles

Before publishing his radical ideas on evolution, Darwin felt he needed to establish undisputed credentials as a serious biologist. From 1846 to 1854, he immersed himself in the painstaking classification of every known species of barnacle, both living and fossilized. His monumental four-volume work on barnacles earned him the Royal Society's Royal Medal and solid credibility in the scientific community. Friends even joked that his children assumed every father spent all day dissecting barnacles in his study.

12. He Played the Bassoon to Test Earthworm Hearing

Late in life, Darwin turned his obsessive curiosity to earthworms, conducting a series of bizarre sensory tests. To discover whether earthworms could hear, he subjected them to various sounds, including shouts, whistles, and even his son playing the bassoon. While the worms showed no response to airborne sound waves, they reacted instantly when placed on a piano while notes were struck. Darwin realized they were intensely sensitive to physical vibrations transmitted through the soil.

13. He Did Not Originate the Phrase "Survival of the Fittest"

The phrase "survival of the fittest" is universally associated with Darwin, but it was actually coined by philosopher Herbert Spencer. Spencer introduced the term in his 1864 book Principles of Biology after reading Darwin's revolutionary work. Darwin was impressed by the concise phrase and incorporated it into the fifth edition of On the Origin of Species in 1869. He felt it was a clearer alternative to his original phrase, "natural selection," which some critics mistakenly believed implied a conscious selector.

14. The Tragic Death of His Daughter Shattered His Faith

While Darwin's scientific discoveries raised doubts about orthodox religious doctrine, it was personal tragedy that truly destroyed his faith. In 1851, his beloved ten-year-old daughter Annie died from what was likely tuberculosis. Watching his innocent child suffer brought Darwin immense grief and convinced him that a benevolent God could not exist. After her death, he ceased attending church services, though he remained respectful of his deeply religious wife's beliefs.

15. He Received a State Funeral and Burial in Westminster Abbey

Despite the intense theological controversy generated by his evolutionary theory, Darwin was revered as a national hero by the time of his death in 1882. The British public and prominent scientific colleagues successfully petitioned for him to receive a state funeral. He was buried in Westminster Abbey, resting just a few feet away from Sir Isaac Newton. This honor solidified his legacy as one of the most influential figures in human scientific history.