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Oral literature is an ancient human tradition found in "all corners of the world." [18] Modern archaeology has been unveiling evidence of the human efforts to preserve and transmit arts and knowledge that depended completely or partially on an oral tradition, across various cultures:
These groups recommend a target below the range 140–160 / 90–100 mmHg for the general population. [ 7 ] [ 14 ] [ 103 ] [ 104 ] Cochrane reviews recommend similar targets for subgroups such as people with diabetes [ 105 ] and people with prior cardiovascular disease. [ 106 ]
During the mid-20th century, the number of new antibiotic substances introduced for medical use increased significantly. From 1935 to 1968, 12 new classes were launched. However, after this, the number of new classes dropped markedly, with only two new classes introduced between 1969 and 2003. [154]
The size of Africa compared to other continents. Africa is the world's second-largest and second-most populous continent after Asia.At about 30.3 million km 2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surface area. [7]
As a result, many network architectures limit the number of repeaters used in a network, e.g., the Ethernet 5-4-3 rule. An Ethernet repeater with multiple ports is known as an Ethernet hub . In addition to reconditioning and distributing network signals, a repeater hub assists with collision detection and fault isolation for the network.
The date of the human discovery and habitation of the Hawaiian Islands is the subject of academic debate. [76] Some archaeologists and historians think it was a later wave of immigrants from Tahiti around 1000 CE who introduced a new line of high chiefs, the kapu system, the practice of human sacrifice, and the building of heiau. [77]