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Post Darwinian Developments I. Physics A. The Age of the Earth

This article explores the post-Darwinian developments in physics, focusing on William Thompson's analysis of heat loss, the discovery of uranium's emission by Henri Becquerel, and the role of radio-active elements in the duration of life on Earth. It also delves into geology, including Alfred Wegener's theory of continental drift, and significant fossils from the Devonian period.

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Post Darwinian Developments I. Physics A. The Age of the Earth

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  1. Post Darwinian Developments I. Physics A. The Age of the Earth

  2. Post Darwinian Developments I .Physics A. The Age of the Earth 1. 1862 - William Thompson - "Lord Kelvin"

  3. Post Darwinian Developments I. Physics A. The Age of the Earth 1. 1862 - William Thompson - "Lord Kelvin" - molten Earth - 7000oF

  4. Post Darwinian Developments I. Physics A. The Age of the Earth 1. 1862 - William Thompson - "Lord Kelvin" - molten Earth - 7000oF - Fourier analysis of heat loss

  5. Post Darwinian Developments I. Physics A. The Age of the Earth 1. 1862 - William Thompson - "Lord Kelvin" - molten Earth - 7000oF - Fourier analysis of heat loss - Earth was 100 million years old

  6. Post Darwinian Developments I. Physics A. The Age of the Earth 1. 1862 - William Thompson - "Lord Kelvin" - molten Earth - 7000oF - Fourier analysis of heat loss - Earth was 100 million years old - Darwin thought it had to be at least 300 million to allow for evolution to occur.

  7. Post Darwinian Developments I. Physics A. The Age of the Earth 1. 1862 - William Thompson - "Lord Kelvin" 2. 1896 - Henri Becquerel

  8. Post Darwinian Developments I. Physics A. The Age of the Earth 1. 1862 - William Thompson - "Lord Kelvin" 2. 1896 - Henri Becquerel - discovers emission of Uranium

  9. Post Darwinian Developments I. Physics A. The Age of the Earth 1. 1862 - William Thompson - "Lord Kelvin" 2. 1896 - Henri Becquerel - discovers emission of Uranium 3. 1903 - Pierre and Marie Curie - discover emission from new element - Radium

  10. Post Darwinian Developments I. Physics A. The Age of the Earth 1. 1862 - William Thompson - "Lord Kelvin" 2. 1896 - Henri Becquerel - discovers emission of Uranium 3. 1903 - Pierre and Marie Curie - discover emission from new element - Radium 4. 1904 - Ernst Rutherford - "The discovery of the radio-active elements, which in their disintegration liberate enormous amounts of energy, thus increases the possible limit of the duration of life on this planet, and allows the time claimed by the geologist and biologist for the process of evolution."

  11. Post Darwinian Developments II. Geology A. The Dynamic Earth

  12. Post Darwinian Developments II. Geology A. The Dynamic Earth - why do coastlines fit?

  13. Post Darwinian Developments II. Geology A. The Dynamic Earth 2. Disjunct Distributions? - southern beech - marsupial fauna

  14. Post Darwinian Developments II. Geology A. The Dynamic Earth Continental Drift - 1915 - Alfred Wegener

  15. - Not accepted until the 1960’s and 1970’s, when sea floor spreading was observed, sonar was used to map the ocean, and paleomagnetism demonstrated where continents had been in the past relative to magnetic north.

  16. - North and South Atlantic and Indian Ocean Basins.

  17. Post Darwinian Developments III. Paleontology A. Intermediate Fossils

  18. FISH AMPHIBIANS Ichthyostega - Fins and gill covers (FISH) - Feet (AMPHIBIANS) - After fish, before amphibians (just where evolution predicts it should be) XXX

  19. D. Devonian (417-354 mya) - Placoderms - Sharks - Lobe-finned Fishes 365 mya 385 mya

  20. Eusthenopteron

  21. Panderichthys rhombolepis

  22. Tiktaalik roseae

  23. Acanthostega gunnari

  24. Ichthyostega sp.

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