History, Science and Trade

History, Science, and Trade Desiree Hopkins

What is History? ,[object Object]

Knowing such stories realizing how the past causes the present and establishing the truth about events can be significant for government leaders, a city council, a jury, an investment group, or an individual. People do want to know where they came from and why present conditions are as they are.,[object Object]

Historical facts can be based on at least two kinds of sources: primary and secondary. Primary means a comment made by someone who was a witness or a participant in an event. An example is a letter or an interview can be because a person who has observed or a contributor when something happened. A secondary source is a record made by someone not present at an event, but who uses primary and other secondary sources as evidence. Most history books are secondary records.,[object Object]

The Journey of Man Spencer Wells has concluded that all humans alive today are descended from a single man who lived in Africa around 60,000 years ago. Well's take on the origins of modern humans and how they came to populate. The Journey of Man: A Genetic Odyssey, and a National Geographic documentary of the same title. In a straightforward story, he explains how he traced the exodus of modern humans from Africa by analyzing genetic changes in DNA from the y-chromosome. human ancestors originated in Africa, and eventually made their way out to the rest of the world. Analysis of the Y chromosome is one of the methods used in tracing the history of early humans early. Thirteen genetic markers on the Y-chromosome differentiate populations of human beings.

Catastrophe 15 hundred yrs. Ago something extreme happened to the climate. The sun became dark, rain poured red as is tinted by blood, clouds of dust enveloped the earth, cold ripped the land for 2 yrs., then came drought, famine, plague, death. Whole cites were wiped out, civilization crumbled there is evidence of a catastrophe it effected the world and history. The mid sixth century catastrophe was the most important date in the history of the past 2000 yrs. It did lay the foundation of the world we live in today.

Comet/ Asteroid ,[object Object]

Comet’s consist of gas and ice.

A 6 kilometer across would have to affect our atmosphere . There is no evidence of a crater left by an impact from the sixth century however, dinosaurs may have been affect by a asteroid.,[object Object]

Erickson and Balée belong to a cohort of scholars that has radically challenged conventional notions of what the Western Hemisphere was like before Columbus. When I went to high school, in the 1970s, I was taught that Indians came to the Americas across the Bering Strait about 12,000 years ago, that they lived for the most part in small, isolated groups, and that they had so little impact on their environment that even after millennia of habitation it remained mostly wilderness. My son picked up the same ideas at his schools. One way to summarize the views of people like Erickson and Balée would be to say that in their opinion this picture of Indian life is wrong in almost every aspect. Indians were here far longer than previously thought, these researchers believe, and in much greater numbers. And they were so successful at imposing their will on the landscape that in 1492 Columbus set foot in a hemisphere thoroughly dominated by humankind.,[object Object]

History, Science and Trade

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