In this blog post, we’ll examine why the theory of evolution is central to the teaching of biological evolution, explore various critical perspectives on this, and discuss the need for balanced science education.

Education and Common Sense: Is the Story of Evolution We’ve Learned Biased?

In standard curricula, students learn that dinosaurs lived during the Mesozoic Era and that humans appeared much later. Consequently, the idea of dinosaurs and humans coexisting—as depicted in movies—is viewed by most people as an unrealistic fantasy. However, contrary to this conventional wisdom, some sources have presented evidence suggesting the possibility that dinosaurs and humans coexisted. While the scientific evaluation of these claims is a separate issue, there have been consistent criticisms that current education on biological evolution is structured around the theory of evolution, with relatively few critical perspectives or alternative interpretations being introduced.
In educational settings, various studies and evidence interpreted as supporting the theory of evolution are primarily presented, whereas critical discussions of the theory are often covered only to a limited extent. Education regarding the division of geological eras and the explanation of index fossils is also centered on the prevailing theories of modern biology and geology. While this approach helps learners understand the mainstream views of the scientific community, some argue that it provides relatively few opportunities for students to fully grasp how scientific theories have evolved through continuous verification and debate.

Darwin’s Theory and Experimental Evidence: Partial Evidence and Limitations

Darwin’s theory of natural selection is one of the core theories of modern biology that explains biological diversity and adaptation. However, at the time Darwin published ‘On the Origin of Species’, genetics had not yet been established, and molecular biological evidence such as that available today did not exist; consequently, there were limitations to the data available to directly substantiate his claims. Since then, advances in genetics, molecular biology, and paleontology have led to the accumulation of various research findings on natural selection and the evolutionary process.
A color change in the peppered moth observed in Britain during the Industrial Revolution is often cited as a classic example of natural selection. In areas where industrial pollution had darkened the color of tree bark, dark-colored peppered moths gained a relative survival advantage, and a shift in the population’s ratio was observed as a result. This case is widely recognized as a prime example demonstrating that natural selection can operate in real-world natural environments.
However, some critics argue that while this case demonstrates the operation of natural selection, it does not, on its own, directly prove the emergence of new species. In other words, the view is that the phenomenon of variation within an existing population being selected and the process of speciation over the long term must be discussed separately. Rather than denying natural selection itself, this argument leads to the assertion that a more detailed examination is needed regarding the role natural selection plays in the long-term evolutionary process.

The Issue of Transitional Fossils and Geological Continuity

In evolutionary biology, various transitional fossils are studied to understand the evolutionary processes between different groups of organisms. To date, numerous transitional fossils have been reported—such as those between fish and tetrapods, and between dinosaurs and birds—and this research is still ongoing.
However, some researchers and critics argue that there are still insufficient continuous transitional fossils across many biological groups. In particular, they point out that there is not always a fossil record rich enough to closely link the processes of change across all lineages, and therefore believe that additional research and evidence will be needed to clarify the specific pathways of evolution.
This criticism is based on the observation that a significant number of discovered fossils often represent organisms that already possess distinct morphological characteristics, while evidence showing all stages of change in a continuous sequence is limited.

Therefore, while the fossil record is a crucial resource for evolutionary research, it is continually being supplemented through new discoveries and studies, and it is expected that various interpretations and reviews will continue in the future.

Claims of Dinosaur-Human Coexistence, Rapid Fossil Formation, and Discussions on Index Fossils

In modern geology, it is understood that dinosaurs appeared during the Mesozoic Era, while modern humans emerged much later during the Cenozoic Era. However, some researchers argue for the possibility of coexistence between dinosaurs and humans, citing dinosaur-like drawings or sculptures reportedly found in regions associated with the Inca civilization. Nevertheless, these examples are not recognized as evidence widely accepted by the scientific community, and various debates continue regarding the dating and interpretation of these artifacts.
Another point of contention concerns the time required for fossil formation. While it was once believed that fossil formation necessarily required a very long time, recent studies have reported that mineralization can occur in a relatively short period under specific environmental conditions. However, these cases of rapid mineralization do not account for all fossil formation processes, and most fossils are still understood to have formed through lengthy geological processes.
There has also been extensive discussion regarding index fossils (representative fossils used to determine the age of specific rock layers). Some argue that a more cautious approach is needed in the use of index fossils, citing cases where species once known as representative organisms of specific geological eras have been found to be still alive today. A prime example is the coelacanth, which was long believed to be extinct but garnered significant attention after living specimens were discovered. However, in modern geology, such cases are not interpreted as directly refuting the concept of index fossils; rather, they are viewed as examples of biological lineages that have persisted for an extremely long period.
Additionally, some have raised claims that human footprints were found alongside trilobite fossils, or that artifacts such as iron bowls and hammers were discovered in very old rock layers. However, these cases have not yet been widely accepted as reliable evidence within the scientific community, and significant controversy continues regarding the circumstances of their discovery, dating methods, and the authenticity of the data. Therefore, when interpreting such cases, it is necessary to consider a variety of research findings and verification processes together.
Fossils and rock strata are crucial subjects of study for understanding Earth’s history, and existing interpretations are often revised or supplemented whenever new discoveries are made. Since science is a discipline that continuously evolves based on new evidence, it is important to maintain an attitude of objectively reviewing various claims and research findings.

Educational Conclusions and Recommendations: How Should Balanced Biology Education Be Conducted?

Biology education goes beyond simply conveying scientific knowledge; it also has a significant influence on the formation of students’ views on life and their values. Education regarding the origin of life and humanity’s place in the world can be linked to human dignity, ethical standards, and, furthermore, the formation of social values; therefore, it must be conducted with care and balance.
Currently, school education centers on the theory of evolution—an established theory in modern biology—which reflects the mainstream views of the scientific community both domestically and internationally. At the same time, science education must also help students understand how various hypotheses have been tested and revised based on the scientific method and evidence. It is important for students to learn that scientific theories are not absolute truths but rather processes that are refined and developed in response to new evidence.
Furthermore, introducing, at an appropriate level, the historical controversies surrounding the theory of evolution, the process of its academic development, and unresolved research questions can help foster students’ critical thinking skills. However, such discussions must be grounded in the accumulated scientific research and verified evidence to date, and it is crucial to clearly distinguish between scientific consensus and claims that have not yet been verified.
The older generation also needs to continuously broaden their understanding of science by reviewing both the knowledge they acquired and new research findings. In the realms of education and public discourse, a culture of discussion centered on objective evidence and verifiable research—while respecting differing opinions—will enable more balanced science education and healthy critical thinking.