Problem: Selenizza is a naturally occurring solid hydrocarbon bitumen found in the native asphalt deposit of Selenice, in Albania, the only European asphalt mine still in use. The rock asphalt is found in the form of veins, filling cracks in a more or less horizontal direction. The bitumen content varies from 83% to 92% (soluble in carbon disulphide), with a penetration value near to zero and a softening point (ring & ball) around 120 C. The insoluble matter, consisting mainly of silica ore, ranges from 8% to 17%.
The veins are found in the form of what?
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Answer: unanswerable

Problem: In January 1957, the US adopted the Eisenhower Doctrine and pledged to prevent the spread of communism and its perceived agents in the Middle East. Although Nasser was an opponent of communism in the region, his promotion of pan-Arabism was viewed as a threat by pro-Western states in the region. Eisenhower tried to isolate Nasser and reduce his regional influence by attempting to transform King Saud into a counterweight. Also in January, the elected Jordanian prime minister and Nasser supporter Sulayman al-Nabulsi brought Jordan into a military pact with Egypt, Syria, and Saudi Arabia.
Although not communist, what about Nasser concerned pro-western groups?
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Answer: pan-Arabism

Problem: Charles Darwin's book The Formation of Vegetable Mould through the Action of Worms (1881) presented the first scientific analysis of earthworms' contributions to soil fertility. Some burrow while others live entirely on the surface, generally in moist leaf litter. The burrowers loosen the soil so that oxygen and water can penetrate it, and both surface and burrowing worms help to produce soil by mixing organic and mineral matter, by accelerating the decomposition of organic matter and thus making it more quickly available to other organisms, and by concentrating minerals and converting them to forms that plants can use more easily. Earthworms are also important prey for birds ranging in size from robins to storks, and for mammals ranging from shrews to badgers, and in some cases conserving earthworms may be essential for conserving endangered birds.
How does burrowers' loosening help the soil?
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Answer:
oxygen and water can penetrate it