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Mass extinctions are characterized by the loss of at least 75% of species within a geologically short period of time (i.e., less than 2 million years). [18] [51] The Holocene extinction is also known as the "sixth extinction", as it is possibly the sixth mass extinction event, after the Ordovician–Silurian extinction events, the Late Devonian extinction, the Permian–Triassic extinction ...
The Billboard Hot 100 is the main song chart of the American music industry and is updated every week by the Billboard magazine. During the 1980s the chart was based collectively on each single's weekly physical sales figures and airplay on American radio stations.
Permian–Triassic boundary at Frazer Beach in New South Wales, with the End Permian extinction event located just above the coal layer [2]. Approximately 251.9 million years ago, the Permian–Triassic (P–T, P–Tr) extinction event (PTME; also known as the Late Permian extinction event, [3] the Latest Permian extinction event, [4] the End-Permian extinction event, [5] [6] and colloquially ...
The GBU-57A/B MOP (Massive Ordnance Penetrator) is a precision-guided, 30,000-pound (14,000 kg) "bunker buster" bomb used by the United States Air Force. [2] The GBU-57 (Guided Bomb Unit-57) is substantially larger than the deepest-penetrating bunker busters previously available, the 5,000-pound (2,300 kg) GBU-28 and GBU-37.
Annapurna – Nepal; Bromo-Tengger-Semeru – Indonesia; Chu Pong Massif – Vietnam; Dhaulagiri – Nepal; Gasherbrum – China-Pakistan; Kangchenjunga – Nepal–India; Knuckles Massif – Sri Lanka
Ladies & Gentlemen... 50 Years of SNL Music is a 2025 American documentary film, directed by Ahmir "Questlove" Thompson and Oz Rodriguez. The film focuses on the late-night sketch show Saturday Night Live and its half-century of musical performances.
In the 1970s and 1980s, during the military regime, Brazil had a secret program intended to develop nuclear weapons. [1] [2] [3] [4] [5] [6] [7] The program was ...
Stonehenge is a prehistoric megalithic structure on Salisbury Plain in Wiltshire, England, two miles (3 km) west of Amesbury.It consists of an outer ring of vertical sarsen standing stones, each around 13 feet (4.0 m) high, seven feet (2.1 m) wide, and weighing around 25 tons, topped by connecting horizontal lintel stones, held in place with mortise and tenon joints, a feature unique among ...