The theory of evolution by natural selection is supported by a large body of evidence from various fields of science including paleontology, biogeography, and molecular biology. For example these include
 
1. The fossil record which shows a progression of changes in species over time, 
2. homologous structures which are similar structures found in different species that suggest a common ancestry, and 
3. DNA evidence which shows similarities in the genetic code of different species

Conversely, the proponents of intelligent design argue that certain features of the universe and living things are best explained by an intelligent cause rather than an undirected process such as natural selection. Some arguments for intelligent design include

1. the complexity of biological systems which they argue could not have arisen through natural processes, 
2. the fine-tuning of physical constants and laws that allow for life to exist, and 
3. the existence of information in DNA

The majority of scientists are convinced by the evidence pointing to theory of biological evolution. To name one: Charles Darwin, a British naturalist who first proposed the theory of biological evolution by natural selection. On the other hand, there are several notable scientists who support intelligent design including Dr. Brian Josephson, a Physics Nobel prize winner.
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