Charles Darwin

Evidence for the volcano theory as the origin of Earth's early atmosphere includes the detection of volcanic gases in the atmospheres of modern volcanoes and the similarity between these gases and the composition of the early Earth's atmosphere as inferred from ancient rocks. Isotopic signatures in ancient rocks also suggest a volcanic origin for Earth's early atmosphere. Furthermore, simulations and models of volcanic outgassing support the idea that volcanic activity played a significant role in shaping the early atmosphere.

Charles Darwin arrived at the Galapagos Islands in September 1835 during his voyage on the HMS Beagle. However, it was during this visit that he made several important observations that influenced his theory of evolution, rather than the actual discovery of the islands themselves.

No, Charles Darwin was not a doctor. He was a naturalist and biologist best known for his contributions to the theory of evolution through natural selection.

Social Darwinism?

The principle of descent with modification states that living species have evolved from common ancestors over time through the mechanism of natural selection. This concept, proposed by Charles Darwin, explains how species adapt and diversify in response to changing environments. It is a fundamental idea in the theory of evolution.

Darwin's finches are a great example of adaptive radiation, where a common ancestor species diversifies into multiple species to exploit different ecological niches. This process of adaptive radiation is a key mechanism in evolutionary biology to explain the diversity of life forms.

An example of this theory can be seen in the Galápagos Islands. The Galápagaos are 16 islands off the coast of South America that Charles observed in 1835. These islands, we now know, were formed 4 million years ago from volcanic activity and had no life on them. Therefore, any animal living there now must have either flown or drifted to the islands. One species thriving in the Galapagos is the Marine Iguana, the only sea going Iguana (a type of lizard) in the world. So, if it is known that the Galápagos were initially empty, "Where did this Iguana come from?" Darwin asked. Other reptiles came to the Galapagos Islands like the Yellow Land Iguana from South America. Reptiles such as these, being able to survive for long periods of time without food or water, could have drifted to the Galápagos on driftwood or bark. Suppose the land Iguana had no food, due to overpopulation, and was forced to feed in the shallow waters on seaweed, small fish and molluscs. If one Iguana could swim better and could hold onto rocks better than others, even slightly, it would get more food and become stronger and healthier. It would therefore win more mates and reproduce more whilst its other brothers and sisters die from starvation. Later generations from this Iguana inherit and refine this talent and will survive and reproduce. Now, there are more of these skilled Iguanas who can also gather food from the sea. Thousands of generations later, with these traits selected, we end up with a new species, the Marine Iguana, which now far outnumbers the Land Iguana.

One major weakness of Charles Darwin's theory during his lifetime was the lack of understanding of the mechanism of heredity. Darwin did not have access to the concept of genetics and could not explain how traits were passed down from one generation to the next. This gap in knowledge led to some skepticism and criticism of his theory of evolution by natural selection.

Changes in the weather led to changes in the food supply available. Sometimes there would be hard nuts, and the finches with tough beaks would survive. However, if, on that same island, the weather changed and longer beaks would be advantageous, the tough-beaked finches would die out and slender beaks would dominate. This is proven by the extensive research carried out by Peter and Rosemary Grant from 1973 to the present.

sherrilee rickwood ,dan Jones

Kinkow☺

With evolution the beaks transformed into long beaks for eating bugs and short beaks for eating seeds

Well being a sophisticates naturalist myself i must say Charles Darwin was a dumb incombuent with no life ;)

sincerly yours: Troll

Before Darwin biology was a hodge podge of observations and disconnected data. Darwin's theory tied virtually every aspect of biology into a unified field of inquiry. It explains the fossil record, the organization and diversification of species, and virtually every other facet of biology.

Darwin's theory radically changed our view of our position in the universe. Before Darwin it made sense that disease was visited upon unfortunate souls as a divine judgment, or simply "bad luck." After Darwin we realized disease are simply opportunistic organisms randomly taking advantage of natural circumstances.

Darwin's later views, particularly as articulated in "The Descent of Man" and his work on sexual selection, expanded the implications of natural selection beyond mere survival to include social and sexual behaviors. He emphasized the role of environmental factors and adaptation in shaping human evolution, integrating new insights into the complexity of evolution. These ideas laid the groundwork for modern evolutionary biology, influencing fields like genetics and anthropology, and challenging contemporary views on human uniqueness. Ultimately, Darwin's later works underscored the interconnectedness of all life forms and the dynamic nature of evolution.

The process of natural selection was important in developing both Mendel's theory of genetics and Darwin's theory of evolution. Natural selection is the mechanism that drives evolutionary change by favoring individuals with advantageous traits for survival and reproduction. Mendel's work on genetics provided a foundational understanding of how traits are inherited, complementing Darwin's ideas on how species evolve over time through natural selection.

Captain Robert FitzRoy was the captain of the HMS Beagle during its most famous voyage, which included Charles Darwin as the ship's naturalist. FitzRoy and Darwin were instrumental in conducting research and mapping the coast of South America during this expedition.

Gradual changes via an unknown (at that time) mechanism, with natural selection weeding out individuals lacking specific adaptations.

So, for instance... every so often we get hairless skinny bears. Well, heck, that's not pretty. And if the weather gets colder, then naturally they get "selected" out - meaning the poor unfuzzy bears don't tend to survive the colder winters in sufficient numbers cmopared to the fat hairy bears.

James Hutton and Charles Lyell's work changed the prevailing idea of catastrophism, which suggested that geological features were mainly the result of sudden, catastrophic events. They proposed the theory of uniformitarianism, which suggests that geological processes occur gradually over time, leading to the formation of Earth's features. This idea paved the way for the development of modern geology.

Emma was a religious woman. She was disturbed by his theory. But she loved him and was proud of his accomplishments. Charles Darwin was a great father, His many children were involved in his work. He would take them on collecting expeditions in the vast grounds of his home. His children loved him, and this must have made Emma happy. There is evidence that one of the reasons Darwin spent years delaying the publication of his book on evolution, was because he was afraid this would upset his wife. But eventually he was forced to publish.

Darwin observed that the finches on the Galapagos Islands had unique beak shapes and sizes that were adaptations to different diets. These variations in beak structure led him to hypothesize that the finches had evolved into different species to better exploit available food sources on the different islands.

Charles Darwin is associated with the theory of evolution by natural selection, which explains how species evolve and adapt to their environments over time through the process of natural selection. He is best known for his work on the origin of species and the idea that all living organisms are descended from a common ancestor.

No.

There is no real evidence about that

Every scientist uses the scienticific method so that every scientist gets the same results.