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Photosynthesis provided a source of free oxygen, but the loss of reducing agents such as hydrogen is thought to have been a necessary precondition for the widespread accumulation of oxygen in the atmosphere. [238] Hence the ability of hydrogen to escape from the atmosphere may have influenced the nature of life that developed on Earth. [239]
420, 4:20 or 4/20 (pronounced four-twenty) is cannabis culture slang for marijuana and hashish consumption, especially smoking around the time 4:20 p.m. (16:20). It also refers to cannabis -oriented celebrations that take place annually on April 20 (4/20 in U.S. date form).
Namma Wifi is a free municipal wireless network in Bangalore, the first free WiFi in India. It began operations on 24 January 2014. Service is available at M.G. Road, Brigade Road, and other locations. The service is operated by D-VoiS and is paid for by the Karnataka state government. [287]
Artificial intelligence (AI), in its broadest sense, is intelligence exhibited by machines, particularly computer systems.It is a field of research in computer science that develops and studies methods and software that enable machines to perceive their environment and use learning and intelligence to take actions that maximize their chances of achieving defined goals. [1]
An F/A-18 taking off from an aircraft carrier An Embraer E-175 taking off. Takeoff is the phase of flight in which an aerospace vehicle leaves the ground and becomes airborne. For aircraft traveling vertically, this is known as liftoff.
"Nosedive" is the first episode in the third series of the British science fiction anthology series Black Mirror. Michael Schur and Rashida Jones wrote the teleplay for the episode, based on a story by series creator and co-showrunner Charlie Brooker, while Joe Wright acted as director.
Photosynthesis changes sunlight into chemical energy, splits water to liberate O 2, and fixes CO 2 into sugar.. Most photosynthetic organisms are photoautotrophs, which means that they are able to synthesize food directly from carbon dioxide and water using energy from light.
Believed to be the first coupon ever, this ticket for a free glass of Coca-Cola was first distributed in 1888 to help promote the drink. By 1913, the company had redeemed 8.5 million tickets. [6] Coca-Cola's 1888-issued "free glass of" is the earliest documented coupon. [6] [7] Coupons were mailed to potential customers and placed in magazines ...
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