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While it is key to the study of evolution to develop a theory to explain how species can change over time it must also be supported by evidence from the scientific study of the natural world One of the difficulties faced by many theories such as Lamarcks was a lack of such evidence Even Darwins theory which is the most widely accepted today had to be proved with scientific advances and fossil evidence in the scientific community Today evidence for evolution comes from a few different angles One is paleontology which shows that gradual change in organisms can be seen in a fossil record Paleontology is used to follow macroevolution or large evolutionary trends This is a key study of evolution because the discoveries of these fossils showed forms of animals that hadnt been seen before and this began to cast serious doubt upon creationist theories Also it can be said that fossils provide the only direct evidence to the history of evolution Another type of study biogeography shows how the species might have spread to new habitats Comparative anatomy a technique that has been used since the very beginning of the study of evolution allows for the comparison of dissimilar organisms to see whether they share a common ancestor The most recent study molecular biology has shown us that even the molecules of life change over time and these can be used to tell just how far back in history any two organisms last shared an ancestor Using these studies of the patterns of evolution it has been found that some species evolve in relation to each other in other ways Species that live in a close relationship with each other like many predator and prey often evolve adaptations to each other in a process called co-evolution In predator-prey relationships this evolution can escalate into rapid changes in offense and defense known as a co-evolutionary arms race This evidence lead
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