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Middle age (3 C, 11 P) O. Old age (16 C, 34 P) Y. Young adult (2 C, 12 P) Youth (23 C, 48 P) Pages in category "Human life stages" The following 7 pages are in this ...
The earliest evidence for life on Earth includes: 3.8 billion-year-old biogenic hematite in a banded iron formation of the Nuvvuagittuq Greenstone Belt in Canada; [30] graphite in 3.7 billion-year-old metasedimentary rocks in western Greenland; [31] and microbial mat fossils in 3.48 billion-year-old sandstone in Western Australia.
The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. [1] [2] [3] The similarities among all known present-day species indicate that they have diverged through the ...
Timeline of computer viruses and worms (1966–present) Timeline of social media (1979/1980–present) Timeline of Linux kernel development (1991–present) Timeline of computing; Microprocessor chronology; Timeline of programming languages; History of computer science; Timeline of video game console releases; Timeline of operating systems ...
These timelines of world history detail recorded events since the creation of writing roughly 5000 years ago to the present day. For events from c. 3200 BC – c. 500 see: Timeline of ancient history; For events from c. 500 – c. 1499, see: Timeline of post-classical history; For events from c. 1500, see: Timelines of modern history
Human history is the record of humankind from prehistory to the present. Modern humans evolved in Africa around 300,000 years ago and initially lived as hunter-gatherers . They migrated out of Africa during the Last Ice Age and had spread across Earth's continental land except Antarctica by the end of the Ice Age 12,000 years ago.
The timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, Homo sapiens, throughout the history of life, beginning some 4 billion years ago down to recent evolution within H. sapiens during and since the Last Glacial Period.
In 2011, a pilot high school course was taught to 3,000 kids in 50 high schools worldwide. [11] In 2012, there were 87 schools, with 50 in the United States, teaching Big History, with the pilot program set to double in 2013 for students in the ninth and tenth grades, [3] and even in one middle school. [73] The subject is a STEM course at one ...