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The history of life on Earth traces the processes by which living and fossil organisms evolved, from the earliest emergence of life to 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 ...
The origin of life on Earth was at least 3.5 billion years ago, possibly as early as 3.8-4.1 billion years ago. [2] [3] [4] Since its emergence, life has persisted in several geological environments. The Earth's biosphere extends down to at least 10 km (6.2 mi) below the seafloor, [10] [11] up to 41–77 km (25–48 mi) [12] [13] into the ...
Cryogenian ice age. Ediacaran biota. Cambrian explosion. Andean glaciation. Earliest tetrapods. Karoo ice age. Earliest apes humans. Quaternary ice age. The timeline of the evolutionary history of life represents the current scientific theory outlining the major events during the development of life on planet Earth.
Abraham Lincoln was born on February 12, 1809, in a one-room log cabin on the Sinking Spring farm, south of Hodgenville in Hardin County, Kentucky. His siblings were Sarah Lincoln Grigsby and Thomas Lincoln, Jr. After a land title dispute forced the family to leave in 1811, they relocated to Knob Creek farm, eight miles to the north.
In relation to biological organisms. Zygote, at the start of an organism's life. Embryo, early in an organism's life. Foetus, early in an animal's life, occurring before birth. Larva, an early stage in many animal life forms before maturity. Child, early human life.
Life is a quality that distinguishes matter that has biological processes, such as signaling and self-sustaining processes, from matter that does not. It is defined descriptively by the capacity for homeostasis, organisation, metabolism, growth, adaptation, response to stimuli, and reproduction. All life over time eventually reaches a state of ...
Early life and career of Barack Obama. Barack Obama, the 44th president of the United States, was born on August 4, 1961, in Honolulu, Hawaii [1] to Barack Obama, Sr. (1936–1982) (born in Oriang' Kogelo of Rachuonyo North District, [2] Kenya) and Stanley Ann Dunham, known as Ann (1942–1995) (born in Wichita, Kansas, United States).
Early life and career of Julius Caesar. The career of Julius Caesar before his consulship in 59 BC was characterized by military adventurism and political persecution. Julius Caesar was born on 12 July 100 BC into a patrician family, the gens Julia, which claimed descent from Iulus, son of the legendary Trojan prince Aeneas, supposedly the son ...