Evolution is a scientific theory that explains how organisms change over time. It is the process by which different species of living things have developed and diversified from earlier forms during the history of the Earth. However, there has been much debate over whether evolution is actually considered a scientific theory or not.

What is a scientific theory

A scientific theory is an explanation of an aspect of the natural world that can be repeatedly tested and verified through experimentation and observation. A theory must be supported by a large body of evidence and be able to make accurate predictions about natural phenomena.

Is evolution a scientific theory

Yes, evolution is considered a scientific theory because it meets all of the criteria for being one. It has been extensively researched and tested through various experiments and observations, and there is overwhelming evidence to support it.

Evidence for evolution

One of the most well-known pieces of evidence for evolution is the fossil record. Fossils provide tangible proof that species have changed over time, as they show gradual transitions between different forms of life.

Another piece of evidence for evolution comes from comparative anatomy. Similarities in bone structure, organ placement, and other physical characteristics between different species suggest that they share a common ancestor.

Genetics also provides strong evidence for evolution. By studying DNA sequences, scientists can trace evolutionary relationships between different species and determine how closely related they are.

The Theory of Natural Selection, proposed by Charles Darwin in 1859, explains how evolution occurs through the process of natural selection. According to this theory, organisms with advantageous traits are more likely to survive and reproduce than those without these traits. Over time, this leads to changes in the frequency of traits within a population, ultimately resulting in evolutionary change.


In conclusion, evolution is indeed a scientific theory, as it meets all of the criteria for being one. It is supported by a large body of evidence from various fields of study, including genetics, comparative anatomy, and the fossil record.

The Theory of Natural Selection provides an explanation for how evolution occurs through the process of natural selection. While there may be disagreements about some aspects of evolution, its status as a scientific theory is not one of them.