The problem: Answer a question about this article:
While it is undisputed that early humans were hunters, the importance of this for the emergence of the Homo genus from the earlier Australopithecines, including the production of stone tools and eventually the control of fire, are emphasised in the hunting hypothesis and de-emphasised in scenarios that stress omnivory and social interaction, including mating behaviour, as essential in the emergence of human behavioural modernity. With the establishment of language, culture, and religion, hunting became a theme of stories and myths, as well as rituals such as dance and animal sacrifice.
Hunting allowed what type of rituals?
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The answer: dance and animal sacrifice


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The first blue-violet LED using magnesium-doped gallium nitride was made at Stanford University in 1972 by Herb Maruska and Wally Rhines, doctoral students in materials science and engineering. At the time Maruska was on leave from RCA Laboratories, where he collaborated with Jacques Pankove on related work. In 1971, the year after Maruska left for Stanford, his RCA colleagues Pankove and Ed Miller demonstrated the first blue electroluminescence from zinc-doped gallium nitride, though the subsequent device Pankove and Miller built, the first actual gallium nitride light-emitting diode, emitted green light. In 1974 the U.S. Patent Office awarded Maruska, Rhines and Stanford professor David Stevenson a patent for their work in 1972 (U.S. Patent US3819974 A) and today magnesium-doping of gallium nitride continues to be the basis for all commercial blue LEDs and laser diodes. These devices built in the early 1970s had too little light output to be of practical use and research into gallium nitride devices slowed. In August 1989, Cree introduced the first commercially available blue LED based on the indirect bandgap semiconductor, silicon carbide (SiC). SiC LEDs had very low efficiency, no more than about 0.03%, but did emit in the blue portion of the visible light spectrum.[citation needed]
What substance helped demonstrate the first blue electroluminescence?
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The answer: zinc-doped gallium nitride


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Queen are one of the most bootlegged bands ever, according to Nick Weymouth, who manages the band's official website. A 2001 survey discovered the existence of 12,225 websites dedicated to Queen bootlegs, the highest number for any band. Bootleg recordings have contributed to the band's popularity in certain countries where Western music is censored, such as Iran. In a project called Queen: The Top 100 Bootlegs, many of these have been made officially available to download for a nominal fee from Queen's website, with profits going to the Mercury Phoenix Trust. Rolling Stone ranked Queen at number 52 on its list of the "100 Greatest Artists of All Time", while ranking Mercury the 18th greatest singer, and May the twenty-sixth greatest guitarist. Queen were named 13th on VH1's 100 Greatest Artists of Hard Rock list, and in 2010 were ranked 17th on VH1's 100 Greatest Artists of All Time list. In 2012, Gigwise readers named Queen the best band of past 60 years.
Where did Queen rank on Rolling Stone's 100 Greatest Artists of All Time in 2001?
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The answer: number 52


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During the 1930s, parts of the state began suffering the consequences of poor farming practices, extended drought and high winds. Known as the Dust Bowl, areas of Kansas, Texas, New Mexico and northwestern Oklahoma were hampered by long periods of little rainfall and abnormally high temperatures, sending thousands of farmers into poverty and forcing them to relocate to more fertile areas of the western United States. Over a twenty-year period ending in 1950, the state saw its only historical decline in population, dropping 6.9 percent as impoverished families migrated out of the state after the Dust Bowl.
How much did Oklahoma's population decline from 1930 to 1950?
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The answer:
6.9 percent