Question: On 17 March 1883, she fell down some stairs at Windsor, which left her lame until July; she never fully recovered and was plagued with rheumatism thereafter. Brown died 10 days after her accident, and to the consternation of her private secretary, Sir Henry Ponsonby, Victoria began work on a eulogistic biography of Brown. Ponsonby and Randall Davidson, Dean of Windsor, who had both seen early drafts, advised Victoria against publication, on the grounds that it would stoke the rumours of a love affair. The manuscript was destroyed. In early 1884, Victoria did publish More Leaves from a Journal of a Life in the Highlands, a sequel to her earlier book, which she dedicated to her "devoted personal attendant and faithful friend John Brown". On the day after the first anniversary of Brown's death, Victoria was informed by telegram that her youngest son, Leopold, had died in Cannes. He was "the dearest of my dear sons", she lamented. The following month, Victoria's youngest child, Beatrice, met and fell in love with Prince Henry of Battenberg at the wedding of Victoria's granddaughter Princess Victoria of Hesse and by Rhine to Henry's brother Prince Louis of Battenberg. Beatrice and Henry planned to marry, but Victoria opposed the match at first, wishing to keep Beatrice at home to act as her companion. After a year, she was won around to the marriage by Henry and Beatrice's promise to remain living with and attending her.
Is there an answer to this question: After her fall up the stairs, what health issue was Victoria plaged with thereafter?

Answer: unanswerable

Question: The term heartwood derives solely from its position and not from any vital importance to the tree. This is evidenced by the fact that a tree can thrive with its heart completely decayed. Some species begin to form heartwood very early in life, so having only a thin layer of live sapwood, while in others the change comes slowly. Thin sapwood is characteristic of such species as chestnut, black locust, mulberry, osage-orange, and sassafras, while in maple, ash, hickory, hackberry, beech, and pine, thick sapwood is the rule. Others never form heartwood.
Is there an answer to this question: What property of heartwood that has nothing to do with how important it is to trees got it its name?

Answer: position

Question: In 1854 president Antonio Lopez de Santa Anna enlarged the area of the Federal District almost eightfold from the original 220 to 1,700 km2 (80 to 660 sq mi), annexing the rural and mountainous areas to secure the strategic mountain passes to the south and southwest to protect the city in event of a foreign invasion. (The MexicanAmerican War had just been fought.) The last changes to the limits of the Federal District were made between 1898 and 1902, reducing the area to the current 1,479 km2 (571 sq mi) by adjusting the southern border with the state of Morelos. By that time, the total number of municipalities within the Federal District was twenty-two.
Is there an answer to this question: When was the boundaries of the city last adjusted?

Answer: 1902

Question: Modern archaeology has led to the discovery of Han artwork portraying inventions which were otherwise absent in Han literary sources. As observed in Han miniature tomb models, but not in literary sources, the crank handle was used to operate the fans of winnowing machines that separated grain from chaff. The odometer cart, invented during Han, measured journey lengths, using mechanical figures banging drums and gongs to indicate each distance traveled. This invention is depicted in Han artwork by the 2nd century AD, yet detailed written descriptions were not offered until the 3rd century AD. Modern archaeologists have also unearthed specimens of devices used during the Han dynasty, for example a pair of sliding metal calipers used by craftsmen for making minute measurements. These calipers contain inscriptions of the exact day and year they were manufactured. These tools are not mentioned in any Han literary sources.
Is there an answer to this question: What has allowed us to discover long lost inventions of the Han era?

Answer:
artwork