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8 " Evolution endowed us with intuition only for those aspects of physics that had survival value for our distant ancestors, such as the parabolic orbits of flying rocks (explaining our penchant for baseball). A cavewoman thinking too hard about what matter is ultimately made of might fail to notice the tiger sneaking up behind and get cleaned right out of the gene pool. Darwin’s theory thus makes the testable prediction that whenever we use technology to glimpse reality beyond the human scale, our evolved intuition should break down. We’ve repeatedly tested this prediction, and the results overwhelmingly support Darwin. At high speeds, Einstein realized that time slows down, and curmudgeons on the Swedish Nobel committee found this so weird that they refused to give him the Nobel Prize for his relativity theory. At low temperatures, liquid helium can flow upward. At high temperatures, colliding particles change identity; to me, an electron colliding with a positron and turning into a Z-boson feels about as intuitive as two colliding cars turning into a cruise ship. On microscopic scales, particles schizophrenically appear in two places at once, leading to the quantum conundrums mentioned above. On astronomically large scales… weirdness strikes again: if you intuitively understand all aspects of black holes [then you] should immediately put down this book and publish your findings before someone scoops you on the Nobel Prize for quantum gravity… [also,] the leading theory for what happened [in the early universe] suggests that space isn’t merely really really big, but actually infinite, containing infinitely many exact copies of you, and even more near-copies living out every possible variant of your life in two different types of parallel universes. "

Max Tegmark , Our Mathematical Universe: My Quest for the Ultimate Nature of Reality

13 " Travel to CubaGenerally Tourist travel to Cuba is prohibited under U.S. law for U.S. citizens, permanent residents, and others subject to U.S. jurisdiction. The hard and fast rules have been relaxed some and exceptions are now made for certain travelers who can show an acceptable reason, to visit the Island Nation in which case a “Tourist Visa" is required and available. US Citizens must have a valid passport with two blank pages available, for entry and exit stamps, at the time of entry into Cuba.United States issued credit and debit cards do not work in Cuba so travelers should plan to bring enough cash with them to cover all the expenses they might incur during their trip. Authorized travelers to Cuba are subject to daily spending limits. See the Office of Foreign Assets Control page of the U.S. Department of the Treasury.The export of Cuban convertible pesos (CUC) is strictly prohibited, regardless of the amount. Travelers may only export the equivalent of $5000 in any currency other than the Cuban convertible peso (CUC). Anyone wishing to export more than this amount must demonstrate evidence that the currency was acquired legitimately from a Cuban bank.Cuba has many Hotels and Resort Areas, most of which are foreign owned; I counted 313 of them. Many are Canadian or European owned with Meliá Hotels International in the lead with twenty-eight hotels in Cuba alone. Being a Spanish hotel chain, it was founded in 1956 in Palma de Mallorca, Spain. The photo show the internationally known “Nacional Hotel.” Some Cruise Lines including Carnival now offer cruises to Cuba and advise guests as to the entry requirements. Follow Captain Hank Bracker, author of “The Exciting Story of Cuba” on Facebook, Goodreads and his Web Page as well as Twitter. His daily blogs and weekend commentaries are now being read by hundreds and frequrntly thousands of readers. Send suggestions and comments to PO Box 607 Elfers, FL 34680-0607. "