3.4 Million B.C. - North and South American land masses become joined.
1.5 Million B.C. - Man uses fire. First true Homo Sapiens (Homo habilus), (Homo erectus). 300,000 B.C.- First Neanderthal man. 40,000 B.C. - Rock engravings made in Australia.
35,000 B.C. - First Cro-magnon man. 33,000 B.C. - Neanderthal man extinct. The disappearance of "Neanderthal man" and the appearance of "Cro-magnon man" both coincided in Europe at about the same time. How or why it came to pass that Cro-magnon man, genetically identical to modern man, replaced Neanderthal man, is a subject of much debate. Any theories attempting to prove why this disappearance took place have been ambiguous, thus far. But we do know that as a result, there is only one member of the genus Homo, and only one hominid in any substantial population left on Earth: Homo Sapiens. There are some theories which suggest that the "Sasquatch" (aka Bigfoot, Abominable Snowman) may be the modern day decendants of an extremely endangered member of the Homo genus. Quite possibly, Neanderthal man.
The first and second theories mentioned only account for the disappearance of Neanderthal. They do not, however, account for the appearance of Cro-magnon. However, the third theory mentioned accounts for both. Furthermore, that theory would also explain the greatest, most personal mystery to man: the human brain. The human brain is, without a doubt, the greatest evidence to promote the third theory. The human brain is a cosmological abstraction. No other species on Earth has one like it. And, modern day science has of yet to discover how it works.
Another one of the amazing characteristics of the human brain is that, usually when an organ of the body (and this applies to all life on Earth) goes unusued for so many generations through offspring, it generally atrophys and disappears. For instance, Humans have tail bones, but no tails; like man's cousin, the mountain guerilla. Wisdom teeth are another example, which have not served any good purpose since man's jaw line became fore-shortened.
Man's own appendix has been long atrophyed, and serves no known purpose at present but to become infected, and explode, resulting in death. The appendix used to be man's second stomach, used by the body to digest raw meat. It went unused for so long, it no longer functions. Today, eating raw meat will harm you. And this is only after about a million years of the first man (Homo habilus, Homo erectus) using fire.
However, this is not the case with the Human brain. It has managed to remain the same size for about the past 2 million years. And still, the average person today only uses about 20% of their brain in their entire lifetime. Leaving a lot more room for growth, and evolution. Its full potential still waiting to be explored by future generations. It is indeed, alien to science.
28,000 B.C. - Stone ax blades in N.Australia.
24,000 B.C. - Oldest cave paintings in Namibia. Human cremation practiced in Australia.
21,000 B.C. - Ivory boomerang made in Poland.
13,000 B.C. - First Humans cross Bering Strait to America.
12,000 B.C. - Domesticated animals.
11,000 B.C. - Obsidian (volcanic glass) used as tools in Greece.
10,000 B.C. - Farming edible plants, agriculture. Estimated Human population of Earth is 5 million. Legendary story of the Chinese Roswell. As the story goes, an alien spacecraft crashed in the Baian-Kara-Ula Himalayan mountains of China, near the border of Tibet. What is believed to be alien remains are later discovered in a cave there in 1938 A.D., by a team lead by Chinese Archeologist Chi Pu-Tei, along with 716 stone discs containing microscopic writing, called "the Dropa stones".
8,700 B.C. - Domesticated sheep in Mesopotamia.
8,000 B.C. - Hairy Mammoths went extinct. Sabre-toothed cats went extinct. Horses vanish from N.America.
7,500 B.C. - Oldest known cemetary in Arkansas.
7,000 B.C. - Pottery sculpted from clay. Farming in Mexico.
6,000 B.C. - Domesticated pigs in China. Domesticated cattle in N.Africa.
5,000 B.C. - Earliest cities in Mesopotamia (carbon-test dated). Egyptian Calendar: regulated by sun and moon. Earliest copper and gold metallurgy in Europe. Chumash fishermen occupy California.
4,000 B.C. - Controlled food supply, hoes, plows, great advancement in agriculture. Estimated population of Earth is 20 million. Cretan ships predominant.
3,760 B.C. - First year of Jewish calendar.
3,500 B.C. - Wheeled carts, pottery, metal tools, boats to trade with by river and sea. Sumerians invent the first known script. Cotton cultivated in Peru.