Seattle Neighborhoods: Portage Bay-Roanoke-North Capitol Hill — Thumbnail History (historylink.org)
Seattle’s Portage Bay-Roanoke-North Capitol Hill neighborhood is located at the far northern end of the north-south ridge that forms Seattle’s Capitol, Renton, First, and Beacon hills. For the purposes of this essay, the distinct but closely related Portage Bay, Roanoke Park, and North Capitol Hill neighborhoods have been combined and their boundary is defined as the area east of Interstate 5, west of Portage Bay, and north of Volunteer Park. Development during the late nineteenth and early twentieth century was spurred by the area’s convenient location: close enough – but not too close – to downtown Seattle. Initially somewhat challenging to access, by 1906 the area had streetcar service. The neighborhood encompasses Interlaken Park, Roanoke Park, and Boren Park. It has been challenged by – and in many ways defined by – the incursion of the Seattle Freeway (later I-5) beginning in the late 1950s and by SR 520 in the early 1960s.- Eoarchean (Wikipedia)
The Eoarchean (IPA: /ˌiːoʊ.ɑːrˈkiːən/ EE-oh-ar-KEE-ən; also spelled Eoarchaean) is the first era of the Archean Eon of the geologic record. It spans 431 million years, from the end of the Hadean Eon 4031 Mya to the start of the Paleoarchean Era 3600 Mya. The beginnings of life on Earth have been dated to this era and evidence of archaea and cyanobacteria date to 3500 Mya, comparatively shortly after the Eoarchean. At that time, the atmosphere was without oxygen and the pressure values ranged from 10 to 100 bar (around 10 to 100 times the atmospheric pressure today).