EXPLORATION AND DISCOVERIES DURING MODERN PERIOD.
EXPLORATION AND DISCOVERIES DURING MODERN PERIOD.
Alexander von Humboldt (1769–1859),
Carl Ritter (1779–1859) and
Charles Darwin (1809–1882)
INTRODUCTION
The modern period of exploration and discovery, particularly in the 19th century, marked a shift from mere descriptive exploration to scientific, systematic, and empirical investigation.
Alexander von Humboldt and Carl Ritter are recognized as the founders of modern geography, while Charles Darwin transformed biology and natural history, all driven by intensive, firsthand exploration and observation.
Alexander von Humboldt (1769–1859)
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| Alexander Von Humboldt |
Humboldt's approach was characterized by a holistic, empirical, and interdisciplinary method known as Humboldtian Science.
1. Scientific Expeditions:
- His 1799–1804 expedition to Latin America with Aimé Bonpland is considered the 'second scientific discovery of America'. He explored the Orinoco River, the Andes, Mexico, and Cuba.
2. Key Discoveries & Contributions:
- Plant Geography (Biogeography): Humboldt established the relationship between climate, vegetation, and altitude, famously visualizing this through his 1807 "Naturgemälde" (a cross-section of Mt. Chimborazo).
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| Humboldt: Essay on the Geography of Plants |
- Isotherms: He invented isotherms (lines joining places of equal temperature) to create a scientific basis for comparing global climates.
- Oceanography: He identified the cold current off the west coast of South America, now known as the Humboldt Current.
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| Humboldt Current |
- Volcanology & Geology: He studied active volcanoes and disproved the Neptunist theory of geology by demonstrating the igneous origin of rocks.
- Environmental Awareness: He recognized that human-induced environmental destruction (deforestation) was altering the climate around Lake Valencia in Venezuela.
Personal Narrative of Travels
- (1814–1829), Essay on the Geography of Plants
- (1807), and his masterpiece, Kosmos
- (1845–1862), which promoted the "unity of nature".
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| Personal Narrative of Travel |
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Carl Ritter (1779–1859)
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| Carl Ritter |
A contemporary of Humboldt, Ritter focused on the regional and human aspects of geography, emphasizing the relationship between the Earth and its inhabitants.
- Ritter’s 19-volume work, Die Erdkunde (1817–1859), aimed at a comprehensive, comparative geography of the world.
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| Book of Carl Ritter |
- Regional Geography: He pioneered the regional approach, studying specific areas (areal differentiation) in their totality, including physical, historical, and cultural elements.
- Comparative Method: He analyzed different regions to understand their similarities and differences, emphasizing the "unity in diversity" of nature.
- Human-Environment Interaction: Ritter argued that geographical features were "organs" of the earth, designed to fit human development (a teleological, or goal-oriented, perspective).
- Academic Discipline: He was the first to hold a university chair in geography in Germany (University of Berlin).
3. Major Works:
- A multi-volume geographical study published from (1817) onward.
- Explained the relationship between nature and human society.
- Emphasized the idea that the physical environment influences human development.
- Considered one of the foundations of modern geographical thought.
- Focused mainly on regional geography, especially Asia and Africa.
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Charles Darwin (1809–1882)
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| Charles Darwin |
While not a geographer by training, Darwin’s explorations provided the foundation for modern biology and evolutionary theory.
1. The Voyage of the Beagle (1831–1836):
was the famous expedition in which Charles Darwin served as a naturalist aboard the HMS Beagle. The journey lasted nearly five years and played a major role in shaping Darwin's scientific idea.
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| The Voyage of the Beagle Charles Darwin |
- Purpose of the voyage: To survey and map the coasts of South America and conduct scientific observations.
- Darwin’s role: He studied plants (flora), animals (fauna), rocks, and fossils.
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| Rocks, |
- Variation of species in different environments.
- Fossils of extinct animals resembling living species.
- Unique wildlife of islands like the Galápagos.
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2. Key Discoveries & Contributions:
- Natural Selection: Darwin discovered that species adapt and evolve through "natural selection" (survival of the fittest) to their environments, a theory developed after observing, among other things, the distinct, adapted finches on the Galápagos Islands.
- Extinct Mammals: In Patagonia, he discovered fossil bones of large, extinct mammals (e.g., Megatherium, Glyptodon) and realized their relationship to living species.
- Geological Uniformitarianism: Inspired by Charles Lyell, his observations of marine fossils at high altitudes in the Andes confirmed that the earth’s surface rises slowly over long periods.
3. Major Works:
- The Voyage of the Beagle (1839)
- On the Origin of Species (1859)
- The Descent of Man (1871)
Summary of Contributions
1. Alexander von Humboldt
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Focus: Physical geography and natural science.
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Method: Empirical, inductive approach and fieldwork.
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Key Idea: Unity of nature and concept of isotherms (climate zones).
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Key Work: Kosmos (1845–1862).
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Legacy: Founder of biogeography and climatology.
2. Carl Ritter
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Focus: Human and regional geography.
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Method: Deductive and comparative method.
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Key Idea: Unity in diversity and teleological approach (nature’s purpose).
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Key Work: Die Erdkunde im Verhältnis zur Natur und zur Geschichte des Menschen (1817–1859).
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Legacy: Foundation of regional planning and human geography.
3. Charles Darwin
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Focus: Biology and natural history.
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Method: Empirical observation and collection of specimens.
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Key Idea: Natural selection and evolution.
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Key Work: On the Origin of Species (1859).
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Legacy: Founder of evolutionary biology.
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