Here is a question about this article: Muslim scientists contributed to advances in the sciences. They placed far greater emphasis on experiment than had the Greeks. This led to an early scientific method being developed in the Muslim world, where progress in methodology was made, beginning with the experiments of Ibn al-Haytham (Alhazen) on optics from circa 1000, in his Book of Optics. The most important development of the scientific method was the use of experiments to distinguish between competing scientific theories set within a generally empirical orientation, which began among Muslim scientists. Ibn al-Haytham is also regarded as the father of optics, especially for his empirical proof of the intromission theory of light. Some have also described Ibn al-Haytham as the "first scientist." al-Khwarzimi's invented the log base systems that are being used today, he also contributed theorems in trigonometry as well as limits. Recent studies show that it is very likely that the Medieval Muslim artists were aware of advanced decagonal quasicrystal geometry (discovered half a millennium later in the 1970s and 1980s in the West) and used it in intricate decorative tilework in the architecture.
What is the answer to this question: Which Muslim scientist worked on trigonometry?
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So... al-Khwarzimi


Here is a question about this article: The result was a sequence of innovative but unpopular financial measures.[nb 10] John levied scutage payments eleven times in his seventeen years as king, as compared to eleven times in total during the reign of the preceding three monarchs. In many cases these were levied in the absence of any actual military campaign, which ran counter to the original idea that scutage was an alternative to actual military service. John maximised his right to demand relief payments when estates and castles were inherited, sometimes charging enormous sums, beyond barons' abilities to pay. Building on the successful sale of sheriff appointments in 1194, John initiated a new round of appointments, with the new incumbents making back their investment through increased fines and penalties, particularly in the forests. Another innovation of Richard's, increased charges levied on widows who wished to remain single, was expanded under John. John continued to sell charters for new towns, including the planned town of Liverpool, and charters were sold for markets across the kingdom and in Gascony.[nb 11] The king introduced new taxes and extended existing ones. The Jews, who held a vulnerable position in medieval England, protected only by the king, were subject to huge taxes; £44,000 was extracted from the community by the tallage of 1210; much of it was passed on to the Christian debtors of Jewish moneylenders.[nb 12] John created a new tax on income and movable goods in 1207 – effectively a version of a modern income tax – that produced £60,000; he created a new set of import and export duties payable directly to the crown. John found that these measures enabled him to raise further resources through the confiscation of the lands of barons who could not pay or refused to pay.
What is the answer to this question: When did John initiate a new round of appointments?
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So... 1194


Here is a question about this article: The marriage of Richard II of England to Anne of Bohemia established contacts between the two nations and brought Lollard ideas to her homeland. The teachings of the Czech priest Jan Hus were based on those of John Wycliffe, yet his followers, the Hussites, were to have a much greater political impact than the Lollards. Hus gained a great following in Bohemia, and in 1414, he was requested to appear at the Council of Constance to defend his cause. When he was burned as a heretic in 1415, it caused a popular uprising in the Czech lands. The subsequent Hussite Wars fell apart due to internal quarrels and did not result in religious or national independence for the Czechs, but both the Catholic Church and the German element within the country were weakened.
What is the answer to this question: What conflict resulted from death of Jan Hus?
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So...
Hussite Wars