One of the most important events of the Proterozoic was the accumulation of oxygen in the Earth's atmosphere.

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Wikipedia contributors. (2024, February 5). Proterozoic. In Wikipedia, The Free Encyclopedia. Retrieved February 14, 2024, from https://en.wikipedia.org/w/index.php?title=Proterozoic&oldid=1203723954

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James Knox Polk was born on November 2, 1795, in a log cabin in Pineville, North Carolina. He was the first of 10 children born into a family of farmers.

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Proterozoic (Wikipedia) The Proterozoic (IPA: /ˌproʊtərəˈzoʊɪk, ˌprɒt-, -əroʊ-, -trə-, -troʊ-/ PROH-tər-ə-ZOH-ik, PROT-, -⁠ər-oh-, -⁠trə-, -⁠troh-) is the third of the four geologic eons of Earth’s history, spanning the time interval from 2500 to 538.8 Mya, the longest eon of the Earth’s geologic time scale. It is preceded by the Archean and followed by the Phanerozoic, and is the most recent part of the Precambrian “supereon”.

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