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Related Concept Videos

The Evidence for Evolution02:55

The Evidence for Evolution

Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.The collection of fossils within sedimentary rocks give a record of common ancestry and often depicts the history of evolution.
What is Evolutionary History?02:35

What is Evolutionary History?

Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.Phylogenetic trees illustrate the evolutionary relationships among these organisms. Scientists infer organisms’ common ancestry by evaluating shared morphological and genetic characteristics. Together, the fossil...
The Fossil Record02:56

The Fossil Record

The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
Convergent Evolution01:54

Convergent Evolution

Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.The structures that arise from convergent evolution are called analogous structures. They are similar in function even if they are dissimilar in structure. Further, structures can be analogous while also...
Eukaryotic Evolution01:24

Eukaryotic Evolution

The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
Evolutionary Psychology01:20

Evolutionary Psychology

Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the human psyche...

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Related Experiment Video

Updated: Jun 16, 2026

Resurrection of Dormant Daphnia magna: Protocol and Applications
07:37

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Published on: January 19, 2018

Evidence for contemporary evolution during Darwin's lifetime.

Adam G Hart1, Richard Stafford, Angela L Smith

  • 1Department of Natural and Social Sciences, University of Gloucestershire, Cheltenham, GL50 4AZ, United Kingdom. ahart@glos.ac.uk <ahart@glos.ac.uk>

Current Biology : CB
|February 11, 2010
PubMed
Summary

Charles Darwin's theory of evolution lacked evidence for contemporary natural selection. The observation of industrial melanism provided this crucial missing link, confirming evolution within a human lifetime.

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Area of Science:

  • Evolutionary Biology
  • Genetics
  • Ecology

Background:

  • Charles Darwin's seminal work, "On the Origin of Species," proposed the theory of evolution.
  • A significant gap in Darwin's evidence was the lack of observable instances of contemporary evolution via natural selection.
  • The concept of evolution occurring within a human timescale remained unproven during Darwin's lifetime.

Discussion:

  • Industrial melanism, particularly the peppered moth (Biston betularia), serves as a powerful example of rapid, observable evolution.
  • The shift in moth coloration from light to dark in response to industrial pollution demonstrated natural selection in action.
  • This phenomenon provided empirical evidence for Darwin's theories, bridging the gap between theoretical concepts and real-world observation.

Key Insights:

  • Industrial melanism offers a clear case study of evolution by natural selection occurring over decades, not millennia.
  • The observation of industrial melanism confirmed Darwin's hypothesis about the mechanism of evolutionary change.
  • This provided the missing empirical evidence for contemporary evolution that Darwin himself lacked.

Outlook:

  • The study of industrial melanism continues to inform our understanding of evolutionary processes and adaptation.
  • It highlights the dynamic nature of species in response to environmental changes.
  • Further research can explore genetic mechanisms underlying such rapid adaptations in various species.