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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 ...
The geologic time scale is a way of representing deep time based on events that have occurred throughout Earth's history, a time span of about 4.54 ± 0.05 Ga (4.54 billion years). [ 5] It chronologically organises strata, and subsequently time, by observing fundamental changes in stratigraphy that correspond to major geological or ...
If the deep marine hydrothermal setting was the site for the origin of life, then abiogenesis could have happened as early as 4.0-4.2 Gya. If life evolved in the ocean at depths of more than ten meters, it would have been shielded both from impacts and the then high levels of ultraviolet radiation from the sun.
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 . It includes brief explanations of the various taxonomic ranks in ...
539 Ma – present. The Phanerozoic Eon (Greek: period of well-displayed life) marks the appearance in the fossil record of abundant, shell-forming and/or trace-making organisms. It is subdivided into three eras, the Paleozoic, Mesozoic and Cenozoic, with major mass extinctions at division points.
It was common for mid-sixteenth-century Tuscan families to name the eldest son after the parents' surname. [23] Hence, Galileo Galilei was not necessarily named after his ancestor Galileo Bonaiuti. The Italian male given name "Galileo" (and thence the surname "Galilei") derives from the Latin "Galilaeus", meaning "of Galilee". [24] [21]
— Chant of Mahatma Gandhi containing thirteen syllables. It is known as Śrī Rāma Tāraka mantra (lit. ' The Rama mantra for Salvation '). Rama had three brothers, according to the Balakanda section of the Ramayana. These were Lakshmana, Bharata and Shatrughna. The extant manuscripts of the text describes their education and training as young princes, but this is brief. Rama is portrayed ...
Gilgamesh (/ ˈ ɡ ɪ l ɡ ə m ɛ ʃ /, [7] / ɡ ɪ l ˈ ɡ ɑː m ɛ ʃ /; [8] Akkadian: 𒀭𒄑𒂆𒈦, romanized: Gilgameš; originally Sumerian: 𒀭𒄑𒉋𒂵𒎌, romanized: Bilgames) [9] [a] was a hero in ancient Mesopotamian mythology and the protagonist of the Epic of Gilgamesh, an epic poem written in Akkadian during the late 2nd millennium BC.