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Related Concept Videos

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...
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 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.
The Tree of Life - Bacteria, Archaea, Eukaryotes02:40

The Tree of Life - Bacteria, Archaea, Eukaryotes

The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both extant and...
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...
Synteny and Evolution02:31

Synteny and Evolution

John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral chromosome underwent...

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[Amateurism in Geology: the French Reception of the Continental Drift Theory (1920-1950)].

Gesnerus·2018
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Darwin and the geological controversies over the steady-state worldview in the 1830s.

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

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Published on: January 19, 2018

Darwin the geologist: Between Lyell and von Buch.

Gabriel Gohau1

  • 1ga.gohau@wanadoo.fr

Comptes Rendus Biologies
|March 27, 2010
PubMed
Summary

Charles Darwin

Area of Science:

  • Geology
  • Evolutionary Biology

Background:

  • Darwin's geological observations post-Beagle voyage informed his scientific reasoning.
  • His work supported Lyell's uniformitarian theory through observations of coastal elevation and oceanic subsidence.

Discussion:

  • Darwin's analysis of erratic boulders suggested geological forces no longer active, unlike lagoon island subsidence.
  • Mountain formation presented challenges, with Darwin noting both uplift (orogenesis) and folding, influenced by plutonic theories.

Key Insights:

  • Darwin's geological reasoning evolved, integrating observations of gradual processes with evidence of past violent events.
  • His later views, particularly on mountain formation, showed a divergence from strict uniformitarianism.

Outlook:

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  • Further research can explore the integration of Darwin's geological insights with modern tectonic theories.
  • Understanding Darwin's geological thought provides context for his broader contributions to science.