Question: The sky is usually clear above the desert and the sunshine duration is extremely high everywhere in the Sahara. Most of the desert enjoys more than 3,600 h of bright sunshine annually or over 82% of the time and a wide area in the eastern part experiences in excess of 4,000 h of bright sunshine a year or over 91% of the time, and the highest values are very close to the theoretical maximum value. A value of 4,300 h or 98% of the time would be recorded in Upper Egypt (Aswan, Luxor) and in the Nubian Desert (Wadi Halfa). The annual average direct solar irradiation is around 2,800 kWh/(m2 year) in the Great Desert. The Sahara has a huge potential for solar energy production. The constantly high position of the sun, the extremely low relative humidity, the lack of vegetation and rainfall make the Great Desert the hottest continuously large area worldwide and certainly the hottest place on Earth during summertime in some spots. The average high temperature exceeds 38 °C (100.4 °F) - 40 °C (104 °F) during the hottest month nearly everywhere in the desert except at very high mountainous areas. The highest officially recorded average high temperature was 47 °C (116.6 °F) in a remote desert town in the Algerian Desert called Bou Bernous with an elevation of 378 meters above sea level. It's the world's highest recorded average high temperature and only Death Valley, California rivals it. Other hot spots in Algeria such as Adrar, Timimoun, In Salah, Ouallene, Aoulef, Reggane with an elevation between 200 and 400 meters above sea level get slightly lower summer average highs around 46 °C (114.8 °F) during the hottest months of the year. Salah, well known in Algeria for its extreme heat, has an average high temperature of 43.8 °C (110.8 °F), 46.4 °C (115.5 °F), 45.5 (113.9 °F). Furthermore, 41.9 °C (107.4 °F) in June, July, August and September. In fact, there are even hotter spots in the Sahara, but they are located in extremely remote areas, especially in the Azalai, lying in northern Mali. The major part of the desert experiences around 3 – 5 months when the average high strictly exceeds 40 °C (104 °F). The southern central part of the desert experiences up to 6 – 7 months when the average high temperature strictly exceeds 40 °C (104 °F) which shows the constancy and the length of the really hot season in the Sahara. Some examples of this are Bilma, Niger and Faya-Largeau, Chad. The annual average daily temperature exceeds 20 °C (68 °F) everywhere and can approach 30 °C (86 °F) in the hottest regions year-round. However, most of the desert has a value in excess of 25 °C (77 °F). The sand and ground temperatures are even more extreme. During daytime, the sand temperature is extremely high as it can easily reach 80 °C (176 °F) or more. A sand temperature of 83.5 °C (182.3 °F) has been recorded in Port Sudan. Ground temperatures of 72 °C (161.6 °F) have been recorded in the Adrar of Mauritania and a value of 75 °C (167 °F) has been measured in Borkou, northern Chad. Due to lack of cloud cover and very low humidity, the desert usually features high diurnal temperature variations between days and nights. However, it's a myth that the nights are cold after extremely hot days in the Sahara. The average diurnal temperature range is typically between 13 °C (55.4 °F) and 20 °C (68 °F). The lowest values are found along the coastal regions due to high humidity and are often even lower than 10 °C (50 °F), while the highest values are found in inland desert areas where the humidity is the lowest, mainly in the southern Sahara. Still, it's true that winter nights can be cold as it can drop to the freezing point and even below, especially in high-elevation areas.
Is there an answer to this question: How much solar energy does the Sahara produce per year?

Answer: unanswerable


Question: As they grew older Madonna and her sisters would feel deep sadness as the vivid memory of their mother began drifting farther from them. They would study pictures of her and come to think that she resembled poet Anne Sexton and Hollywood actresses. This would later raise Madonna's interest in poetry, with Sylvia Plath being her favourite. Later, Madonna commented: "We were all wounded in one way or another by [her death], and then we spent the rest of our lives reacting to it or dealing with it or trying to turn into something else. The anguish of losing my mom left me with a certain kind of loneliness and an incredible longing for something. If I hadn't had that emptiness, I wouldn't have been so driven. Her death had a lot to do with me saying—after I got over my heartache—I'm going to be really strong if I can't have my mother. I'm going to take care of myself." Taraborrelli felt that in time, no doubt because of the devastation she felt, Madonna would never again allow herself, or even her daughter, to feel as abandoned as she had felt when her mother died. "Her death had taught [Madonna] a valuable lesson, that she would have to remain strong for herself because, she feared weakness—particularly her own—and wanted to be the queen of her own castle."
Is there an answer to this question: Who does Madonna's mum resemble?

Answer: poet Anne Sexton


Question: The country bounced between socialism and adherence to the neoliberal model. Land reform and nationalizations were enforced; the Portuguese Constitution (approved in 1976) was rewritten in order to accommodate socialist and communist principles. Until the constitutional revisions of 1982 and 1989, the constitution was a highly charged ideological document with numerous references to socialism, the rights of workers, and the desirability of a socialist economy. Portugal's economic situation after its transition to democracy, obliged the government to pursue International Monetary Fund (IMF)-monitored stabilization programs in 1977–78 and 1983–85.
Is there an answer to this question: Between which two political ideals did Portugal bounce between?

Answer: socialism and adherence to the neoliberal model


Question: DNA samples from 1228 Russians show that the Y chromosomes analyzed, all except 20 (1.6%) fall into seven major haplogroups all characteristic to West Eurasian populations. Taken together, they account for 95% of the total Russian Y chromosomal pool. Only (0.7%) fell into haplogroups that are specific to East and South Asian populations. Mitochondrial DNA (mtDNA) examined in Poles and Russians revealed the presence of all major European haplogroups, which were characterized by similar patterns of distribution in Poles and Russians. An analysis of the DNA did not reveal any specific combinations of unique mtDNA haplotypes and their subclusters. The DNA clearly shows that both Poles and Russians are not different from the neighbouring European populations.
Is there an answer to this question: DNA of Poles and Russians differ from what group?

Answer:
unanswerable