History, science, and trade

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History, science, and trade

  1. 1. History, Science, and Trade Paige Ellis 09/26/10
  2. 2. Why is History Important? <ul><li>History explains and validates the present. </li></ul><ul><li>Interpreting events and finding meaning in them is a necessary part of being human. </li></ul><ul><li>Knowledge of other people leads to empathy for them, which can prevent intolerance and malevolence. </li></ul>
  3. 3. How are Modern Methods Changing History? <ul><li>Science can’t give us the complete story, and it can’t tell us the meaning of past events, but it can verify the facts to back those stories up. </li></ul><ul><ul><li>Carbon dating helps us confirm time periods </li></ul></ul><ul><ul><li>DNA testing helps us explore human ancestry and prove the links between people. </li></ul></ul><ul><ul><li>Microscopic analysis can show us details like what a person ate, what they looked like, and how they lived. </li></ul></ul>For example…
  4. 4. The Journey of Man <ul><li>Spencer Wells’ work in DNA analysis has led to a new theory on the origin of mankind </li></ul><ul><ul><li>African DNA has the oldest gene traits and the greatest genetic diversity </li></ul></ul><ul><ul><li>Wells uses the development of new traits to approximate when hominids first left Africa and where they went. </li></ul></ul><ul><ul><li>Based on this evidence, he has concluded that all humans are descended from a common African ancestor who lived 60,000 years ago. </li></ul></ul>
  5. 5. Catastrophe! <ul><li>Around 535 A.D, accounts from all over the world describe a darkening of the sun, a change in climate, and the spread of disease and famine. </li></ul><ul><ul><li>Analysis of tree rings shows that the temperature dropped significantly around this time period </li></ul></ul><ul><ul><li>High levels of carbon and sulfur in the ice caps indicate volcanic activity </li></ul></ul><ul><ul><li>Many scientists believe that the eruption of Krakatoa may have caused this worldwide event. </li></ul></ul>
  6. 6. America Before Columbus <ul><li>New analysis of evidence has lead to a different idea of the Americas before European contact </li></ul><ul><ul><li>Based on calculations of the death rate from disease, scientists estimate that the indigenous population may have reached well over 10 million before they were hit by epidemics. </li></ul></ul><ul><ul><li>New discoveries in the Amazon show that the rainforest may have once supported large complex societies, who dramatically altered the environment to meet their needs. </li></ul></ul>

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