Charles Darwin's Theory Of Evolution

Darwin’s theory of evolution is based on the theory of natural selection. Natural selection is the the process whereby organisms better adapted to their environment tend to survive and produce more offspring. This theory is now widely believed by many people throughout the world. Charles Darwin’s theory includes the idea that fossils of extinct animals turn up where similar animals live today. Darwin came up with this theory when he discovered fossils of animals that were very similar to the animals that were living today. Darwin also observed that the Galapagos tortoise’s had different shapes of their shells depending on which island they came from. Darwin believed that these tortoises were adapting to their environment by changing their shell
overtime. He discovered that due to the different environmental aspects of each island the shells were adapted to be fit the island they were present on. Through Darwin’s expedition he also noticed that the mockingbirds were different depending on which island they were from. He saw that the birds had different beak sizes and body type depending on what their food sources were or what their predators were. Darwin concluded that each island has similar but distinct animals living on them. Each island had animals that were adapted to their environment to be able to survive as best as they could. The evolution of each animal has led to their survival because they are the fittest.