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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 ...
Bacterial viruses (bacteriophages) emerge before or soon after the divergence of the prokaryotic and eukaryotic lineages. [44] Red beds show an oxidising atmosphere, favouring the spread of eukaryotic life. [45] [46] [47] 1500 Ma Volyn biota, a collection of exceptionally well-preserved microfossils with varying morphologies. [48] 1300 Ma
This is a list of the oldest living people who have been verified to be alive as of the dates of the cited supporting sources. It was estimated in 2015 that between 150 and 600 living people had reached the age of 110. [1]
In April 2006, Nature note that the oldest (and first early Neolithic) evidence for the drilling of human teeth in vivo (i.e. in a living person) was found in Mehrgarh. [ 120 ] 6200 BC - 6000 BC: The 8.2-kiloyear event , a sudden decrease of global temperatures, probably caused by the final collapse of the Laurentide Ice Sheet , which leads to ...
Evolution of live birth , with early therians probably having pouches for keeping their undeveloped young like in modern marsupials. Nipples stemmed out of the therian milk lines. The posterior orifice separates into anal and urogenital openings; males possess an external penis.
See calendar and list of calendars for other groupings of years. See history , history by period , and periodization for different organizations of historical events. For earlier time periods, see Timeline of the Big Bang , Geologic time scale , Timeline of evolution , and Logarithmic timeline .
The date used as the end of the ancient era is arbitrary. The transition period from Classical Antiquity to the Early Middle Ages is known as Late Antiquity.Late Antiquity is a periodization used by historians to describe the transitional centuries from Classical Antiquity to the Middle Ages, in both mainland Europe and the Mediterranean world: generally from the end of the Roman Empire's ...
Harold would have been celebrating his victory at Stamford Bridge on the night of 26/27 September 1066, while William of Normandy's invasion fleet set sail for England on the morning of 27 September 1066. [160] Harold marched his army back down to the south coast, where he met William's army, at a place now called Battle just outside Hastings ...