- Source: Black pool
- Source: Black Pool
Black pool, originally known as everlasting pool, was a form of pocket billiards (pool) mainly played in the late 19th century, first being recorded in 1862. This game was derived from life pool but lacked the pooling of bets and players had unlimited lives.: 30 It had as many colour balls as players with an additional black ball that was placed on the centre spot. A player is paid a life (stake) from the opponent whose ball was potted. The player is then allowed to pot the black ball which meant all opponents must pay a life. Balls are respotted after being potted and the best strategy is to alternate potting colour and black to maximize money. Around 1875, black pool was merged with pyramid pool to form the new game of snooker, today one of the most popular cue sports in the world.
References
Black Pool is a hot spring in the West Thumb Geyser Basin of Yellowstone National Park in the United States.
The pool was cool enough up until 1991 for dark orange-brown cyanobacteria to grow throughout the pool. When combined with the blue of the water, the pool appeared to be an exceptionally dark green to almost black, hence the name.
An exchange of function took place in 1991, shifting thermal energy to Black Pool and nearby Abyss Pool, causing them to heat up. Black Pool's temperature became hot enough to kill all the cyanobacteria in the pool, turning the pool a rich teal blue color. The pool also had frequent boiling eruptions on August 15, 1991, doming the water to 3 feet and causing heavy runoff. Black Pool remains extremely hot, and is now one of Yellowstone's most beautiful and intensely blue pools. The name of the pool remains "Black Pool."
References
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