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Daryl Bambic

Wegener and Continental Drift Theory - 0 views

  • Survival of the fittest" gave an ethical dimension to the no-holds barred capitalism of the late nineteenth century.
  • ppropriated elements of evolution by natural selection to justify the ruthless business practices of his time
  • Darwin, was the ultimate insider
  • ...24 more annotations...
  • Erasmus, was an early student of evolution and his half-cousin, Francis Galton, was a noted statistician who was considered the father of eugenics.
  • o worries about money
  • connections in the scientific world
  • philosopher, Herbert Spencer.
  • famous biologist, Thomas Huxle
  • But fact and reason alone cannot explain the different reactions to new hypotheses and theories we see in the examples above.
  • faith that future scientists will address the shortcomings in the initial theories.
    • Daryl Bambic
       
      When the facts don't neatly fit the theory, scientists have faith that time, discovery and the hard work of others will eventually prove the theory to be true.  Theories are not always neat equations where all variables are explained, accounted for and even understood. We see this with both Darwin and Wegener.
  • Being German wasn't Wegener's only problem; the arguments he used to support his hypothesis crossed into disciplines that were not his specialty.
  • Darwin's theory quickly came to dominate. Within 5 years, Oxford University was using a biology textbook that discussed biology in the context of evolution by natural selection.
  • At Oxford, evolution by natural selection had gone from hypothesis to a priori
    • Daryl Bambic
       
      A priori means that something is accepted as true, knowledge that is known without having to investigate it.  We use reason and deduction to know that X is true, so it is a priori.
  • Wegener did not have an explanation for how continental drift could have occurred
  • little challenge until the 1960's.
  • he drew from the fields of geology, geography, biology and paleontolog
  • coal deposits, commonly associated with tropical climates, would be found near the North Pole and why the plains of Africa would show evidence of glaciation.
  • A radical new view on their discipline could be a threat to their own authority.
  • "If we are to believe in Wegener's hypothesis we must forget everything which has been learned in the past 70 years and start all over again."
  • The authorities in the various disciplines attacked him as an interloper that did not fully grasp their own subject.
  • The reactions by the leading authorities in the different disciplines was so strong and so negative that serious discussion of the concept stopped
  • The world had to wait until the 1960's for a wide discussion of the Continental Drift Theory to be restarted.
  • Alfred Wegener is one modern scientist amongst many that demonstrate that new ideas threaten the establishment, regardless of the century.
  • ontinental Drift Theory through the first few decades of the twentieth century.
  • continents had once been joined, and over time had drifted apart.
David Bono-Raftopoulos

Darwin's Theory - 0 views

  • the search for a mechanism of evolution. The first was Jean Lamarck. The second was one of the greatest figures in biology, Charles Darwin.
  • mechanism
  • mechanism
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  • Assume that there were salamanders living in some grasslands. Suppose, Lamarck argued, that these salamanders had a hard time walking because their short legs couldn't trample the tall grasses or reach the ground. Suppose that these salamanders began to slither on their bellies to move from place to place. Because they didn't use their legs, the leg muscles wasted away from disuse and the legs thus became small.
  • passed this acquired trait
  • Darwin disliked school
  • no legs.
  • by inheriting the acquired characteristic of
  • Darwin's Background
  • o have extraordinary talents.
  • genius, did not at first appear
  • legless salamanders evolved
  • d observing birds and collecting insects to study.
  • sent to medical school in Scotland
  • "intolerably dull
  • interested in attending natural history lectures.
  • university at Cambridge, England, in 1827.
  • Darwin be chosen for the position of naturalist on the ship the HMS Beagle.
  • thousands
  • Principles of Geology by Charles Lyell,
  • In the Andes he observed fossil shells of marine organisms in rock beds at about 4,300 m.
  • One reason that Darwin was so eager to study life on land was that he suffered from terrible seasickness and couldn't wait to get off the Beagle.
  • to collect specimens, make observations, and keep careful records of anything he observed that he thought significant.
  • trekked hundreds of miles through unmapped region.
  • catalog his specimens and write his notes.
  • praised by the scientific community.
  • experts for study.
  • bird specialist
  • Darwin's bird collections from the Galapagos Islands, located about 1,000 km west of South America.
  • 13 similar
  • Other experts
  • believe that species change over time.
  • evidence f
  • In 1837 Darwin began his first notebook on evolution. For several years Darwin filled his notebooks with facts that could be used to support the theory of evolution.
  • fossils of similar relative ages are more closely related than those of widely different relative ages.
  • He ran his own breeding experiments and also did experiments on seed dispersal.
  •  
    Very interesting document, it is a credible site, and has multiple pages of information about Darwin's Theory of Evolution. Helped me quite a bit for my TFAD assignment. 
Daryl Bambic

HHMI's BioInteractive - Lecture Series and Informal Talks - 0 views

  • Flash HD, Flash Medium, Flash Low
    • Daryl Bambic
       
      This is a great topic for TFAD assignment.
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