The Past in Threes - 13.7 Billion years

 

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Table of Contents

Summary

Charts

Pamphlet

Physical

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13.7 Gya

4.6 Gya

 

Biological

1.5 Gya

500 Mya

165 Mya

55 Mya

 

Pre Human

18 Mya

6 Mya

2 Mya

675 Kya

 

Oral History

225 Kya

75 Kya

25 Kya

 

Recorded History

-6,600

-900

1000  

 

Modern

1630

1840

1910

1945

1991

 

Future

Postscript

Charts

These charts help illustrate some of the points covered.

Extinctions

Although some extinctions are more famous, such as the asteroid that caused dinosaur extinctions, extinctions were relatively frequent:

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Ice Sheets

The earth was so warm 4 million years ago that the Antarctic was free of ice. Dinosaurs lived when temperatures were 5 degrees C or 9 degrees F warmer.

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Continental Drift

                                570 Million Years Ago                                                                400 Million Years Ago

                               190 Million Years Ago                                                      

                                20 Million Years Ago                                                        Today

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Future Super Continent

                                         250 Million Years in the Future

Source: http://www.scotese.com/future2.htm

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Source: http://www.windows.ucar.edu/tour/link=/life/geologic_time.html 

 

Author: Paul Raynault    &