Question: Indigenous genetic studies suggest that the first inhabitants of the Americas share a single ancestral population, one that developed in isolation, conjectured to be Beringia. The isolation of these peoples in Beringia might have lasted 10–20,000 years. Around 16,500 years ago, the glaciers began melting, allowing people to move south and east into Canada and beyond. These people are believed to have followed herds of now-extinct Pleistocene megafauna along ice-free corridors that stretched between the Laurentide and Cordilleran Ice Sheets.
Is there an answer to this question: How many years may the isolation of the peoples in Beringia lasted?

Answer: 10–20,000 years


Question: Motors have very little room for electrical insulation so they generally have low voltage ratings. Because transformers (prior to the development of power electronics) cannot step down DC voltages, trains were supplied with a relatively low DC voltage that the motors can use directly. The most common DC voltages are listed in the previous section. Third (and fourth) rail systems almost always use voltages below 1 kV for safety reasons while overhead wires usually use higher voltages for efficiency. ("Low" voltage is relative; even 600 V can be instantly lethal when touched.)
Is there an answer to this question: Motors have a lot of room for electrical what?

Answer: unanswerable


Question: After being rendered obsolete by the redesign, the 1895 replica was presented in 1910 to the FA's long-serving president Lord Kinnaird. Kinnaird died in 1923, and his family kept it in their possession, out of view, until putting it up for auction in 2005. It was duly sold at Christie's auction house on 19 May 2005 for £420,000 (£478,400 including auction fees and taxes). The sale price set a new world record for a piece of football memorabilia, surpassing the £254,000 paid for the Jules Rimet World Cup Trophy in 1997. The successful bidder was David Gold, the then joint chairman of Birmingham City; claiming the FA and government were doing nothing proactive to ensure the trophy remained in the country, Gold stated his purchase was motivated by wanting to save it for the nation. Accordingly, Gold presented the trophy to the National Football Museum in Preston on 20 April 2006, where it went on immediate public display. It later moved with the museum to its new location in Manchester. In November 2012, it was ceremonially presented to Royal Engineers, after they beat Wanderers 7–1 in a charity replay of the first FA Cup final.
Is there an answer to this question: Who won the bid? 

Answer: David Gold


Question: Karl Marx published the Communist Manifesto in February 1848, with little attention. However, a few days later the French Revolution of 1848 broke out, which replaced the monarchy of Louis Philippe with the Second French Republic. In June 1848, Paris workers, disenchanted with the new government, built barricades and raised red flags. The new government called in the French Army to put down the uprising, the first of many such confrontations between the army and the new worker's movements in Europe.
Is there an answer to this question: What did Paris workers do in June 1488?

Answer:
unanswerable