British Isles North America Asia North Pacific North atlantic Ocean Africa Phillippine Indian Ocean South slands Galapagos Madagascar Society Ascension Mauritius Valparaiso Bourbon island Australia Montevideo King Georges Buenos aires Good Hope Port Desire Hobart South atlantic Zealand Straits of Magellan Islands Cape Horn Tierra del Fuego FIGURE 1.6 The five-year voyage of H. M.S. Beagle. Most of the time was spent exploring the coasts and coastal islands of South America, such as the Galapagos Islands. Darwin's studies of the animals of the galapagos Islands played a key role in his eventual development of the theory of evolution by means of natural selection FIGURE 1.7 Cross section of the Beagle. A 10-gun brig of 242 tons, only 90 feet in length. the beagle had a crew of 74 people! After he first saw the ship, Darwin wrote to his college sea fessor henslow:“Th absolute want of room is an evil that nothing can as naturalist on a five-year navigational mapping expedition different subjects, including the formation of oceanic islands around the coasts of South America(figure 1.6), aboard from coral reefs and the geology of South America. He also H M.S. Beagle(figure 1.7). During this long voyage, Darwin devoted eight years of study to barnacles, a group of small had the chance to study a wide variety of plants and animals marine animals with shells that inhabit rocks and pilings on continents and islands and in distant seas. He was able to eventually writing a four-volume work on their classification explore the biological richness of the tropical forests, exam- and natural history. In 1842, Darwin and his family moved ine the extraordinary fossils of huge extinct mammals in out of London to a country home at Down, in the county of Patagonia at the southern tip of South America, and observe Kent. In these pleasant surroundings, Darwin lived, studied the remarkable series of related but distinct forms of life on and wrote for the next 40 years the galapagos Islands, off the west coast of South America. Such an opportunity clearly played an important role in the development of his thoughts about the nature of life on Darwin was the first to propose natural selection as an earth When Darwin returned from the voyage at the age of 27, e diversity of life on earth. His hypothesis began a long period of study and contemplation. During grew from his observations on a five-year voyage around the next 10 years, he published important books on several the world Chapter 1 The Science of Biology 11as naturalist on a five-year navigational mapping expedition around the coasts of South America (figure 1.6), aboard H.M.S. Beagle (figure 1.7). During this long voyage, Darwin had the chance to study a wide variety of plants and animals on continents and islands and in distant seas. He was able to explore the biological richness of the tropical forests, exam￾ine the extraordinary fossils of huge extinct mammals in Patagonia at the southern tip of South America, and observe the remarkable series of related but distinct forms of life on the Galápagos Islands, off the west coast of South America. Such an opportunity clearly played an important role in the development of his thoughts about the nature of life on earth. When Darwin returned from the voyage at the age of 27, he began a long period of study and contemplation. During the next 10 years, he published important books on several different subjects, including the formation of oceanic islands from coral reefs and the geology of South America. He also devoted eight years of study to barnacles, a group of small marine animals with shells that inhabit rocks and pilings, eventually writing a four-volume work on their classification and natural history. In 1842, Darwin and his family moved out of London to a country home at Down, in the county of Kent. In these pleasant surroundings, Darwin lived, studied, and wrote for the next 40 years. Darwin was the first to propose natural selection as an explanation for the mechanism of evolution that produced the diversity of life on earth. His hypothesis grew from his observations on a five-year voyage around the world. Chapter 1 The Science of Biology 11 British Isles Western Isles Europe Africa Indian Ocean Madagascar Mauritius Bourbon Island Cape of Good Hope King George’s Sound Hobart Sydney Australia New Zealand Friendly Islands Phillippine Islands Equator North Pacific Ocean Asia North Atlantic Ocean Cape Verde Marquesas Galápagos Islands Valparaiso Society Islands Straits of Magellan Cape Horn Tierra del Fuego Falkland Islands Port Desire South Atlantic Ocean Montevideo Buenos Aires Rio de Janeiro St. Helena Ascension North America Canary Islands Keeling Islands South America Bahia FIGURE 1.6 The five-year voyage of H.M.S. Beagle. Most of the time was spent exploring the coasts and coastal islands of South America, such as the Galápagos Islands. Darwin’s studies of the animals of the Galápagos Islands played a key role in his eventual development of the theory of evolution by means of natural selection. FIGURE 1.7 Cross section of the Beagle. A 10-gun brig of 242 tons, only 90 feet in length, the Beagle had a crew of 74 people! After he first saw the ship, Darwin wrote to his college professor Henslow: “The absolute want of room is an evil that nothing can surmount