The Investigative Question

What can evolution actually produce, and can known evolutionary processes explain the major innovations in the history of life?

Overview

Evolution involves more than the familiar phrase "random mutation and natural selection." Scientists also study genetic drift, gene duplication, recombination, changes in gene regulation, the origin of new genes, changes in protein function, developmental processes, and the movement of genes between organisms.

We want to understand these mechanisms accurately before asking where their explanatory reach may lie. We must also distinguish different kinds of biological innovation. The origin of a new gene, a new function, a new anatomical feature, a major developmental change, and the later success of a new biological form are related questions, but they are not the same question.

What We Investigate

We will examine mutation, natural selection, experimental evolution, gene duplication, the origin of new genes, changes in protein function, gene regulation, speciation, developmental change, convergence, and major biological innovation.

We will pay special attention to examples in which researchers can identify the actual genetic changes involved. We will also ask how evidence for observed change connects to proposed explanations for major historical innovations.

Why It Matters

It is not enough to say that evolution happens. Nor is it enough to say that evolution cannot explain something because we do not yet know how it happened.

Observed evolutionary mechanisms can produce meaningful genetic, functional, regulatory, and phenotypic changes. The larger question is how those demonstrated processes relate to the origin of major structures, systems, and forms of biological organization in the history of life.

  Explore the Evidence

This investigation draws upon 12 related evidence records. A few are highlighted below. The complete evidence library is available for readers who want to examine the research in greater depth.

Mutation and Variation

Mutations and other genetic changes continually introduce variation into populations. These changes provide raw material upon which selection, drift, and other evolutionary processes can act.

Examine this evidence  

Natural Selection

Natural selection changes populations when inherited variations affect survival or reproduction. It can produce substantial adaptation to particular environments.

Examine this evidence  

Experimental Evolution

Laboratory evolution experiments allow researchers to observe populations over many generations and identify genetic changes associated with adaptation and new traits.

Examine this evidence  

View all evidence records for this investigation  

  What Does This Suggest About Design?

Intelligent Design does not require us to deny ordinary evolutionary change. Mutation, selection, gene duplication, new gene formation, changes in protein function, regulatory change, speciation, and other evolutionary processes can be investigated empirically.

The important question is whether known mechanisms and the available historical evidence adequately account for particular major biological innovations, or whether some features are better explained by purposeful organization. That question should be examined case by case rather than answered in advance.

Conclusion

The evidence examined in this investigation establishes substantial evolutionary change and several mechanisms capable of producing genuine biological novelty. It also shows why biological innovation should not be treated as a single process. Different kinds of novelty involve different genetic, functional, developmental, and historical questions.

The investigation therefore does not end merely by asking whether evolution occurs. It asks how well demonstrated mechanisms and the available historical evidence account for particular major innovations. That provides a more useful basis for considering the claims of Intelligent Design than assuming either unlimited evolutionary power or universal evolutionary inadequacy at the outset.