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A flock of starlings reacting to a predator. Swarm intelligence (SI) is the collective behavior of decentralized, self-organized systems, natural or artificial. The concept is employed in work on artificial intelligence. The expression was introduced by Gerardo Beni and Jing Wang in 1989, in the context of cellular robotic systems. [1] [2]
Sleeping occurs at night while the animal is lying down. [88] Elephants average 3–4 hours of sleep per day. [ 89 ] Both males and family groups typically move no more than 20 km (12 mi) a day, but distances as far as 180 km (112 mi) have been recorded in the Etosha region of Namibia. [ 90 ]
Animal Farm is a satirical allegorical novella, in the form of a beast fable, [1] by George Orwell, first published in England on 17 August 1945. [2] [3] It tells the story of a group of anthropomorphic farm animals who rebel against their human farmer, hoping to create a society where the animals can be equal, free, and happy.
A black hole is a region of spacetime wherein gravity is so strong that no matter or electromagnetic energy (e.g. light) can escape it. [2] Albert Einstein's theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
The Tulsa race massacre, also known as the Tulsa race riot or the Black Wall Street massacre, [12] was a two-day-long white supremacist terrorist [13] [14] massacre [15] that took place between May 31 and June 1, 1921, when mobs of white residents, some of whom had been appointed as deputies and armed by city government officials, [16] attacked black residents and destroyed homes and ...
The wolf (Canis lupus; [b] pl.: wolves), also known as the grey wolf or gray wolf, is a canine native to Eurasia and North America.More than thirty subspecies of Canis lupus have been recognized, including the dog and dingo, though grey wolves, as popularly understood, only comprise naturally-occurring wild subspecies.
Baa Baa Black Sheep (renamed Black Sheep Squadron for the second season) is an American television series that aired on NBC from September 23, 1976, until April 6, 1978. It was part period military drama, part comedy. In the final seven episodes, the character list was revamped, dropping some squadron pilots, adding a 16-year-old pilot and four ...
The production of silk originated in China in the Neolithic period, although it would eventually reach other places of the world (Yangshao culture, 4th millennium BC). Silk production remained confined to China until the Silk Road opened at some point during the latter part of the 1st millennium BC, though China maintained its virtual monopoly over silk production for another thousand years.