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[2] [3] Estimates on the number of Earth's current species range from 10 million to 14 million, [4] with about 1.2 million or 14% documented, the rest not yet described. [5] However, a 2016 report estimates an additional 1 trillion microbial species, with only 0.001% described.
Paleolithic c. 1.36 million years ago Neolithic period c. 10,000 – 2100 BCE Ancient China c. 2100 – 221 BCE Imperial period c. 221 BCE – 1911 CE Modern period. Americas North America North America: Lithic/Paleo-Indian (pre 8000 BCE) Archaic (c. 8000 – 1000 BCE) Woodland (1000 BCE to 1000 CE) Mississippian (800 CE to 1600 CE) Mesoamerica ...
Before Homo sapiens, Homo erectus had already spread throughout Africa and non-Arctic Eurasia by about one million years ago. The oldest known evidence for anatomically modern humans (as of 2017) are fossils found at Jebel Irhoud, Morocco, dated about 360,000 years old. [2]
This watch was carved from a meteorite that hit Earth a million years ago. Oscar Holland, CNN. December 5, 2024 at 8:29 PM. ... Muonionalusta meteorite is made primarily from iron, meaning the duo ...
The ice core spans at least 1.2 million years of Earth’s climate history. ... could also reveal why the planet’s ice ages suddenly became longer and more intense about 1 million years ago, ...
Earth formed in this manner about 4.54 billion years ago (with an uncertainty of 1%) [25] [26] [4] and was largely completed within 10–20 million years. [27] In June 2023, scientists reported evidence that the planet Earth may have formed in just three million years, much faster than the 10−100 million years thought earlier.
The Mid-Pleistocene Transition, which occurred between 1.2 million and 900,000 years ago, marks the fundamental shift in Earth’s glacial cycles, Barbante said.
Basin Groups Era begins on Earth. c. 4,450 Ma – 100 million years after the Moon formed, the first lunar crust, formed of lunar anorthosite, differentiates from lower magmas. The earliest Earth crust probably forms similarly out of similar material. On Earth the pluvial period starts, in which the Earth's crust cools enough to let oceans form.