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End Ordovician: 440 million years ago, 86% of all species lost, including graptolites; Late Devonian: 375 million years ago, 75% of species lost, including most trilobites; End Permian, The Great Dying: 251 million years ago, 96% of species lost, including tabulate corals, and most trees and synapsids
100 BC: Walrus ivory is carved into Okvik figures, other ornaments, and implements on the St. Lawrence and Punuk Islands in the Bering Strait; semi-subterranean houses are built. [1] 100 BC–500 AD: The Hopewell tradition begins flourishing in much of the East, with copper mining centered in the Great Lakes region.
Patrilineal and matrilineal most recent common ancestors (MRCAs) of living humans roughly between 200 and 100 kya [56] [57] with some estimates on the patrilineal MRCA somewhat higher, ranging up to 250 to 500 kya. [58] 160,000 years ago, Homo sapiens idaltu in the Awash River Valley (near present-day Herto village, Ethiopia) practiced ...
Image credits: Photoglob Zürich "The product name Kodachrome resurfaced in the 1930s with a three-color chromogenic process, a variant that we still use today," Osterman continues.
Counting down to Christmas was done at least 100 years ago. This reminder appeared in the Daily Eagle on Dec. 4, 1924. The Pet and Novelty Shoppe announced they were opening at the end of the year ...
Aug. 17—100 Years Ago Aug. 17, 1923 In a bare whitewashed room, in Montevue Hospital, the county's poorhouse, with windows looking out on the vivid sunshine of a Frederick County fall day, and ...
As for life on land, in 2019 scientists reported the discovery of a fossilized fungus, named Ourasphaira giraldae, in the Canadian Arctic, that may have grown on land a billion years ago, well before plants are thought to have been living on land. [99] [100] [101] The earliest life on land may have been bacteria 3.22 billion years ago. [102]
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