Timeline

1. Cosmic time (13.7 billion year lifetime of the universe) is commonly used in the Big Bang models.

2. Paleolithic period (Old Stone Age) about 2.5 million years ago to 10,00 B.C.

3. Neolithic period (New Stone Age)  around 8000 B.C to 3000 B.C. This era is connected with agriculture and animal domestication. It is interesting to know that because agriculture developed at different times in different places of the world, the dates for the Neolithic era vary from 9000 B.C.E to 2000 B.C.E.
https://www.ancient.eu/Neolithic

4. The ancient era began “give or take” 3000 B.C. The Ancient era encompasses the first cities in Mesopotamia, the unification of Egypt, and the Bronze Age. Additionally, this was the era where the earliest known actual writings were recorded (cuneiform and Hieroglyphs). The date for when the ancient world ended is not clear; however, it is estimated that it ended with the fall of Rome in AD 476.
https://www.ancientworldmagazine.com/articles/defining-ancient-world/

5. Classical era began roughly around 476 AD according to historian of texts. The date of when the classic era ended varies from 1453-1492.
https://www.inrap.fr/en/periods

6. Modern times is said to be seen as an age of transition between the middle ages and modern time. The Modern era is dated from around 1450-1800. During the late Modern period we come to see demographic growth, industrialization/productivism, political revolution, wars, the decline of Christianity, agriculture, progress in medicine…etc.

7. Ecozoic era refers to the Earth entering a new geological era. (21st Century)
https://ecozoictimes.com/what-is-the-ecozoic/what-does-ecozoic-mean/

8. Gaiac time period was not easy for me to find. In fact I did not find anything of this time. Is there a different name for this time?


Based on my online research on all of this wonderful and interesting eras, I find it absolutely necessary to include the Cosmic, Gaiac and Ecozoic eras on our World History Timeline. After all, these eras are part/mesh with our existence on Planet Earth. We can not completely grasp concepts if we being studying them towards the middle or end. At least in my opinion and how I like to learn concepts are from the beginning to the end. In this way, I am able visualize and connect the dots. However, if we are studying a specific time for time management then an exception is made (in my opinion). Yet, I would still be curious of how it all began.