Charles Darwin's voyage aboard the HMS Beagle and his revolutionary theory of evolution by natural selection fundamentally changed how we understand life on Earth. From his observations of finches in the Galápagos to his meticulous study of barnacles and orchids, Darwin built a case for gradual biological change that challenged prevailing beliefs of his time. His ideas continue to shape biology, medicine, and our understanding of human origins—making him one of history's most influential naturalists. See how much you know about the man, his discoveries, and the legacy that still resonates today.
▶ Play today's quizCharles Darwin is most famous for developing which scientific theory?
Source: Darwin's natural selection explained how species change over generations, reshaping all of biology.
Which remote island group is most associated with inspiring Darwin's ideas?
Source: The Galápagos species, isolated and unique, gave Darwin clues that life adapts to its environment.
Which birds on the Galápagos famously showed Darwin variation in beak shapes?
Source: Different beaks suited different foods, hinting that species adapt to local conditions.
Darwin's idea that the fittest individuals tend to survive is often summed up as what?
Source: The phrase was actually coined by Herbert Spencer, and Darwin later adopted it.
On the Beagle voyage, what was Darwin's main official role?
Source: Darwin signed on largely as a gentleman companion for the captain, and as the ship's naturalist.
Darwin gathered key evidence during a five-year voyage aboard which ship?
Source: HMS Beagle carried Darwin around the world; he was only 22 when the voyage began.
Darwin was born in 1809 on the very same day as which other historic figure?
Source: Darwin and Lincoln were born on the exact same day: February 12, 1809.
In which country was Charles Darwin born?
Source: Darwin was born in Shrewsbury, England, into a wealthy and well-connected family.
Darwin's most famous book, published in 1859, is best known by what short title?
Source: Its full title was much longer, but 'On the Origin of Species' became one of history's most influential books.
What does the scientific term 'natural selection' describe?
Source: Nature 'selects' traits that help organisms survive and reproduce, with no designer involved.
Darwin's 1871 book applying evolution to humans carried what title?
Source: Here Darwin argued humans share ancestry with other animals, including apes.
Another naturalist independently reached natural selection, prompting Darwin to publish. Who?
Source: Wallace's letter from Asia spurred Darwin to finally publish after decades of delay.
Which rival theory claimed traits acquired in life are passed to offspring?
Source: Lamarck thought a giraffe stretching its neck would pass a longer neck on; Darwin's mechanism differed.
Whom did Darwin marry, keeping the bond within his own extended family?
Source: Darwin married his first cousin Emma Wedgwood and later worried about inbreeding's effects on their children.
Darwin's last book, published in 1881, focused on which humble creatures?
Source: Darwin spent years studying how earthworms slowly transform soil, calling them nature's plough.
Before evolution, Darwin spent eight years producing a detailed study of which animals?
Source: His exhaustive barnacle work earned him scientific credibility before Origin was published.
Darwin proposed that coral atolls form as a central island slowly does what?
Source: As the island sinks, coral keeps growing upward, leaving a ring-shaped reef behind.
Which fierce defender of Darwin's ideas was nicknamed 'Darwin's Bulldog'?
Source: Huxley championed evolution publicly, famously sparring with a bishop in an 1860 Oxford debate.
Which geologist's book on slow earth changes deeply shaped Darwin's thinking aboard the Beagle?
Source: Lyell's 'Principles of Geology' showed Darwin that tiny changes over vast time can transform the world.
Darwin predicted an unknown moth with a long tongue must exist based on which flower?
Source: Decades after his death, a moth with an enormous proboscis matching the orchid was finally discovered.