42 facts: now at 142 entries

42-facts.json

@@ -17,7 +17,7 @@
   {
     "id": 4,
     "category": "mathematics",
-    "fact": "42 in binary is 101010 \u2014 perfect alternation"
+    "fact": "42 in binary is 101010 — perfect alternation"
   },
   {
     "id": 5,
@@ -42,7 +42,7 @@
   {
     "id": 9,
     "category": "sports",
-    "fact": "Jackie Robinson #42 \u2014 only number retired across all of MLB"
+    "fact": "Jackie Robinson #42 — only number retired across all of MLB"
   },
   {
     "id": 10,
@@ -127,7 +127,7 @@
   {
     "id": 26,
     "category": "astronomy",
-    "fact": "Messier 42 is the Orion Nebula \u2014 closest stellar nursery"
+    "fact": "Messier 42 is the Orion Nebula — closest stellar nursery"
   },
   {
     "id": 27,
@@ -208,5 +208,605 @@
     "id": 42,
     "category": "culture",
     "fact": "Elvis Presley died at age 42"
+  },
+  {
+    "id": 43,
+    "category": "mathematics",
+    "fact": "42 in Roman numerals is XLII.",
+    "detail": "The notation appears on Super Bowl logos, clock faces, and monument inscriptions; Super Bowl XLII (2008) used it on all official branding."
+  },
+  {
+    "id": 44,
+    "category": "mathematics",
+    "fact": "There are exactly 42 integer partitions of 10 (p(10) = 42).",
+    "detail": "The partition function p(n) counts the number of ways to write n as a sum of positive integers; Ramanujan and Hardy's asymptotic formula made it famous in the early 20th century."
+  },
+  {
+    "id": 45,
+    "category": "mathematics",
+    "fact": "The 42nd prime number is 181.",
+    "detail": "Counting primes from 2: the sequence reaches 179 at position 41 and 181 at position 42, confirmed by direct enumeration."
+  },
+  {
+    "id": 46,
+    "category": "mathematics",
+    "fact": "The sum of all integers from 1 to 42 equals 903.",
+    "detail": "By Gauss's formula n(n+1)/2 = 42×43/2 = 903; this makes 903 the 42nd triangular number."
+  },
+  {
+    "id": 47,
+    "category": "mathematics",
+    "fact": "42 is a nontotient: no positive integer n satisfies Euler's totient function φ(n) = 42.",
+    "detail": "Nontotients are integers outside the range of φ; 42 cannot be the count of integers coprime to any modulus."
+  },
+  {
+    "id": 48,
+    "category": "mathematics",
+    "fact": "42 is a practical number: every integer from 1 to 41 can be expressed as a sum of distinct divisors of 42.",
+    "detail": "Its divisors {1, 2, 3, 6, 7, 14, 21} cover every smaller positive integer without gaps."
+  },
+  {
+    "id": 49,
+    "category": "mathematics",
+    "fact": "The arithmetic mean of the integers 1 through 83 is exactly 42.",
+    "detail": "For any arithmetic sequence starting at 1, mean = (n+1)/2; solving for 42 gives n = 83."
+  },
+  {
+    "id": 50,
+    "category": "mathematics",
+    "fact": "The Collatz sequence starting from 42 reaches 1 in exactly 8 steps: 42→21→64→32→16→8→4→2→1.",
+    "detail": "The Collatz conjecture (unproven for all integers since 1937) states every positive integer eventually reaches 1 under this rule."
+  },
+  {
+    "id": 51,
+    "category": "mathematics",
+    "fact": "In base 6, the number 42 is written as 110; in base 5, it is 132.",
+    "detail": "1×36 + 1×6 + 0 = 42 in base 6; 1×25 + 3×5 + 2 = 42 in base 5."
+  },
+  {
+    "id": 52,
+    "category": "mathematics",
+    "fact": "42 has exactly 8 divisors: 1, 2, 3, 6, 7, 14, 21, and 42.",
+    "detail": "A product of three distinct primes p×q×r always has (1+1)³ = 8 divisors; 42 = 2×3×7 is the smallest sphenic number with 8 divisors after 30."
+  },
+  {
+    "id": 53,
+    "category": "chemistry",
+    "fact": "Molybdenum (element 42) has the highest melting point of any element in period 5 at 2,623°C (4,753°F).",
+    "detail": "This exceeds all neighboring period-5 elements; niobium melts at 2,477°C and ruthenium at 2,334°C."
+  },
+  {
+    "id": 54,
+    "category": "chemistry",
+    "fact": "Molybdenum was first identified in molybdenite ore by Carl Scheele in 1778 and isolated as a metal by Peter Jacob Hjelm in 1781.",
+    "detail": "The name comes from the Greek 'molybdos' (lead) because molybdenite was confused with lead sulfide and graphite."
+  },
+  {
+    "id": 55,
+    "category": "chemistry",
+    "fact": "Molybdenum disulfide (MoS₂) is a solid lubricant used in spacecraft, extreme-pressure machinery, and dry environments where liquid lubricants fail.",
+    "detail": "Its layered hexagonal crystal structure — analogous to graphite — allows sheets to slide past each other with minimal friction."
+  },
+  {
+    "id": 56,
+    "category": "chemistry",
+    "fact": "Molybdenum (Z=42) has an anomalous electron configuration [Kr]4d⁵5s¹ rather than the expected [Kr]4d⁴5s².",
+    "detail": "A half-filled d subshell (4d⁵) is particularly stable energetically, overriding the standard Aufbau filling order."
+  },
+  {
+    "id": 57,
+    "category": "chemistry",
+    "fact": "Molybdenum is the heaviest essential trace element required by virtually all living organisms.",
+    "detail": "It is the metal cofactor in nitrogenase (the enzyme that fixes atmospheric nitrogen) and xanthine oxidase, making it critical to the nitrogen cycle."
+  },
+  {
+    "id": 58,
+    "category": "chemistry",
+    "fact": "Molybdenum is added to stainless steel grade 316 to improve resistance to pitting corrosion from chloride ions.",
+    "detail": "316 stainless steel (containing 2–3% Mo) is the standard material for marine equipment, surgical instruments, and food processing machinery."
+  },
+  {
+    "id": 59,
+    "category": "physics",
+    "fact": "René Descartes calculated in 1637 that the primary rainbow appears at exactly 42° from the antisolar point for red light.",
+    "detail": "Using geometric optics, he showed that refraction and reflection inside spherical water droplets concentrate light intensity at this specific angle."
+  },
+  {
+    "id": 60,
+    "category": "physics",
+    "fact": "The critical angle for total internal reflection in common glass (refractive index 1.5) is arcsin(1/1.5) = 41.8°, effectively 42°.",
+    "detail": "Light hitting the glass-air boundary at angles greater than this is completely reflected internally — the principle underlying optical fibers."
+  },
+  {
+    "id": 61,
+    "category": "astronomy",
+    "fact": "Asteroid 42 Isis was discovered on May 23, 1856 by Norman Pogson at the Madras Observatory.",
+    "detail": "It is a large S-type main-belt asteroid approximately 100 km in diameter, one of the first hundred minor planets discovered."
+  },
+  {
+    "id": 62,
+    "category": "astronomy",
+    "fact": "Jupiter's 42nd moon by order of discovery is Hegemone, an irregular retrograde satellite discovered in 2000.",
+    "detail": "Hegemone belongs to the Ananke group of Jupiter's retrograde moons, which are believed to be fragments of a single captured asteroid."
+  },
+  {
+    "id": 63,
+    "category": "astronomy",
+    "fact": "NGC 42 is a lenticular galaxy in the constellation Pegasus, catalogued by John Dreyer in the New General Catalogue (1888).",
+    "detail": "It is a faint early-type galaxy visible only through moderate-to-large amateur telescopes."
+  },
+  {
+    "id": 64,
+    "category": "computing",
+    "fact": "Douglas Adams confirmed in a 1993 Usenet post that he chose 42 arbitrarily: 'I sat at my desk, stared into the garden and thought 42 will do.'",
+    "detail": "He emphasized there was no mathematical or philosophical significance: it was chosen as 'a small, ordinary number that was funny.'"
+  },
+  {
+    "id": 65,
+    "category": "computing",
+    "fact": "TCP/IP protocol number 42 is assigned to SDRP (Source Demand Routing Protocol), defined in RFC 1940 (1996).",
+    "detail": "SDRP was an experimental protocol for policy-based Internet routing; it was never widely deployed and the protocol number remains historically reserved."
+  },
+  {
+    "id": 66,
+    "category": "computing",
+    "fact": "Port 42 (TCP and UDP) is assigned to WINS — the Windows Internet Name Service — Microsoft's system for resolving NetBIOS names to IP addresses.",
+    "detail": "WINS operates similarly to DNS but for legacy Windows networking; port 42 was designated in the original IANA service name registry."
+  },
+  {
+    "id": 67,
+    "category": "computing",
+    "fact": "The original Hitchhiker's Guide to the Galaxy radio series premiered on BBC Radio 4 on March 8, 1978.",
+    "detail": "Written by Douglas Adams and produced by Geoffrey Perkins, it was the first broadcast of the number 42 as the Answer to Life, the Universe, and Everything."
+  },
+  {
+    "id": 68,
+    "category": "computing",
+    "fact": "Deep Thought, the computer in Hitchhiker's Guide, took 7.5 million years to calculate that the answer to Life, the Universe, and Everything is 42.",
+    "detail": "When the answer was revealed, the descendants of the original programmers were disappointed and commissioned a new computer (Earth) to find the question."
+  },
+  {
+    "id": 69,
+    "category": "computing",
+    "fact": "Wolfram Alpha returns '42' when asked 'What is the answer to life, the universe, and everything?' as a built-in Easter egg.",
+    "detail": "Google also returns 42 for the same query; both responses embed the Hitchhiker's Guide reference as a deliberate in-joke for programmers."
+  },
+  {
+    "id": 70,
+    "category": "computing",
+    "fact": "In CPython (the standard Python interpreter), hash(42) == 42 for small integers, due to the identity hash applied to cached integer objects.",
+    "detail": "CPython caches integers from -5 to 256 and uses the integer value itself as the hash; for larger integers, a more complex hashing algorithm is applied."
+  },
+  {
+    "id": 71,
+    "category": "sports",
+    "fact": "Super Bowl XLII (February 3, 2008): the New York Giants defeated the New England Patriots 17–14, ending New England's bid for a perfect 19–0 season.",
+    "detail": "David Tyree's 'Helmet Catch' in the final minutes is considered one of the greatest plays in Super Bowl history."
+  },
+  {
+    "id": 72,
+    "category": "sports",
+    "fact": "Pat Tillman wore #42 for the Arizona Cardinals before leaving the NFL in 2002 to enlist in the US Army; he was killed in Afghanistan on April 22, 2004.",
+    "detail": "The Cardinals retired #42 in his honor; Tillman was posthumously awarded the Silver Star and Purple Heart."
+  },
+  {
+    "id": 73,
+    "category": "sports",
+    "fact": "Ronnie Lott wore #42 for the San Francisco 49ers throughout his Hall of Fame career (1981–1990).",
+    "detail": "Lott won four Super Bowls with the 49ers and is considered one of the greatest safeties in NFL history."
+  },
+  {
+    "id": 74,
+    "category": "sports",
+    "fact": "James Worthy wore #42 for the Los Angeles Lakers, winning six NBA championships (1982, 1985, 1987, 1988) and NBA Finals MVP in 1988.",
+    "detail": "Worthy's #42 was retired by the Lakers; he was inducted into the Naismith Memorial Basketball Hall of Fame in 1994."
+  },
+  {
+    "id": 75,
+    "category": "sports",
+    "fact": "The game of Texas 42 was invented around 1887 by two teenagers in Garner, Texas — William Thomas and Walter Earl — who were forbidden from playing card games.",
+    "detail": "They adapted the game using dominoes to satisfy their parents' religious objections; 42 became the state domino game of Texas in 2011."
+  },
+  {
+    "id": 76,
+    "category": "sports",
+    "fact": "Kareem Abdul-Jabbar played his final NBA season at age 42 (1988–89), the oldest player ever to win the scoring title in multiple seasons.",
+    "detail": "Abdul-Jabbar retired at 42 as the NBA's all-time leading scorer (38,387 points), a record that stood until 2023."
+  },
+  {
+    "id": 77,
+    "category": "sports",
+    "fact": "The 1966 FIFA World Cup Final: England defeated West Germany 4–2 at Wembley Stadium on July 30, 1966.",
+    "detail": "Geoff Hurst scored a hat-trick in the final, including the controversial 'was it over the line?' third goal that remains debated to this day."
+  },
+  {
+    "id": 78,
+    "category": "sports",
+    "fact": "The 42nd Ryder Cup (2018) was held at Le Golf National near Paris; Europe defeated the USA 17.5–10.5.",
+    "detail": "Francesco Molinari went 5–0 for Europe — the first player ever to win all five Ryder Cup matches in a single edition."
+  },
+  {
+    "id": 79,
+    "category": "sports",
+    "fact": "Jerry Stackhouse wore #42 for the Milwaukee Bucks (2006–07) and other NBA teams during his 18-year career.",
+    "detail": "Stackhouse scored 41 points in a game against the Chicago Bulls in 2001 — 41 and 42 representing consecutive milestones in his jersey history."
+  },
+  {
+    "id": 80,
+    "category": "sports",
+    "fact": "The 42nd Boston Marathon was held in 1938 (the race began in 1897; the 1918 wartime event was replaced by a relay).",
+    "detail": "The Boston Marathon is the world's oldest annual marathon, organized by the Boston Athletic Association (BAA) since its first running."
+  },
+  {
+    "id": 81,
+    "category": "sports",
+    "fact": "Rule 42 of the MCC Laws of Cricket (2000 edition) governs 'Fair and Unfair Play,' covering actions like ball tampering and intimidatory bowling.",
+    "detail": "When the Laws were restructured in 2017, the content of Law 42 was expanded and redistributed across multiple sections."
+  },
+  {
+    "id": 82,
+    "category": "sports",
+    "fact": "In Major League Baseball, uniform number 42 was worn by Butch Huskey, Mo Vaughn, and Mariano Rivera — all after Jackie Robinson's retirement.",
+    "detail": "After Robinson's number was retired league-wide in 1997, players already wearing 42 were grandfathered; Rivera was the last, retiring in 2013."
+  },
+  {
+    "id": 83,
+    "category": "history",
+    "fact": "The Battle of Philippi (October 42 BC): Mark Antony and Octavian defeated Brutus and Cassius, ending the last republican resistance to the Roman Empire.",
+    "detail": "Both Brutus and Cassius committed suicide after the battle; the victory cemented the Second Triumvirate's control and set the stage for Augustus's empire."
+  },
+  {
+    "id": 84,
+    "category": "history",
+    "fact": "Isaac Newton was born on December 25, 1642 (Julian calendar), the same year Galileo Galilei died.",
+    "detail": "In the Gregorian calendar (adopted in Britain in 1752), Newton's birth date converts to January 4, 1643; the year 1642 is iconic in the history of science."
+  },
+  {
+    "id": 85,
+    "category": "history",
+    "fact": "The Treaty of Nanking (August 29, 1842) ended the First Opium War; China ceded Hong Kong Island to Britain and opened five treaty ports.",
+    "detail": "It was the first of China's 'Unequal Treaties' and initiated a century of Western influence over Chinese trade and territory."
+  },
+  {
+    "id": 86,
+    "category": "history",
+    "fact": "December 2, 1942: Enrico Fermi achieved the first controlled, self-sustaining nuclear chain reaction in Chicago Pile-1 beneath Stagg Field, University of Chicago.",
+    "detail": "The experiment lasted 28 minutes at a power of about 0.5 watts; physicist Arthur Compton reported the success to Washington in a coded phone call: 'The Italian navigator has just landed in the new world.'"
+  },
+  {
+    "id": 87,
+    "category": "history",
+    "fact": "October 3, 1942: The first successful V-2 rocket launch (A4/V-2) reached 84.5 km altitude at Peenemünde, Germany — the highest altitude ever achieved by a man-made object at that time.",
+    "detail": "Test director Walter Dornberger declared: 'Today the spaceship is born.' The rocket flew 190 km downrange and established rocket propulsion as viable for reaching space."
+  },
+  {
+    "id": 88,
+    "category": "history",
+    "fact": "April 18, 1942: The Doolittle Raid — 16 B-25 bombers launched from USS Hornet — carried out the first US air strike on the Japanese home islands.",
+    "detail": "Led by Lt. Col. James Doolittle, the raid caused minimal material damage but was a significant morale boost for the US and proved Japan was not invulnerable to air attack."
+  },
+  {
+    "id": 89,
+    "category": "history",
+    "fact": "November 8, 1942: Operation Torch began — the Allied invasion of French North Africa, opening a second front against the Axis powers.",
+    "detail": "Anglo-American forces landed simultaneously in Morocco and Algeria; it was the largest amphibious operation in history to that date."
+  },
+  {
+    "id": 90,
+    "category": "history",
+    "fact": "August 23, 1942: The Battle of Stalingrad began with a massive German air assault on the city; the battle would last until February 2, 1943.",
+    "detail": "Stalingrad was the largest and bloodiest single battle in the history of warfare, with approximately 2 million total casualties on all sides."
+  },
+  {
+    "id": 91,
+    "category": "history",
+    "fact": "The Mines Act of 1842 (Britain) prohibited women and boys under 10 from working in underground coal mines.",
+    "detail": "The Act followed a Royal Commission report by Anthony Ashley Cooper that revealed harrowing conditions, including children as young as 5 working in mines."
+  },
+  {
+    "id": 92,
+    "category": "history",
+    "fact": "In AD 42, Emperor Claudius ordered the construction of a new harbor at Portus (Ostia) to ensure Rome's grain supply from Egypt.",
+    "detail": "The harbor, completed under Nero in 64 AD, featured a 2-km breakwater and could accommodate the largest grain ships of the Roman world."
+  },
+  {
+    "id": 93,
+    "category": "religion",
+    "fact": "Numbers 33 (Hebrew Bible) lists exactly 42 stopping places during the Israelites' journey from Egypt to the plains of Moab.",
+    "detail": "The 42 encampments are named in sequence from Rameses to the Jordan River; rabbinic tradition assigns spiritual significance to each stage."
+  },
+  {
+    "id": 94,
+    "category": "religion",
+    "fact": "Revelation 13:5 states the Beast is given authority to act for exactly 42 months.",
+    "detail": "The 42 months (3.5 years or 1,260 days) appears multiple times in Revelation and Daniel; scholars debate whether it refers to literal or symbolic time."
+  },
+  {
+    "id": 95,
+    "category": "religion",
+    "fact": "The Tibetan Book of the Dead (Bardo Thödol) describes 42 peaceful deities that appear to the soul in the Bardo of Dharmata after death.",
+    "detail": "These 42 Peaceful Deities are manifestations of the mandala of the 42 Peaceful Buddhas; recognizing them as projections of one's own mind is considered the path to liberation."
+  },
+  {
+    "id": 96,
+    "category": "religion",
+    "fact": "Psalm 42 opens: 'As the deer pants for streams of water, so my soul pants for you, my God.'",
+    "detail": "It is attributed to the Sons of Korah and is widely used in Jewish liturgy; it is the 42nd Psalm in the Hebrew tradition."
+  },
+  {
+    "id": 97,
+    "category": "religion",
+    "fact": "Numbers 35:7 specifies that 48 cities were to be given to the Levites, of which 42 were regular Levitical cities and 6 were cities of refuge.",
+    "detail": "The cities of refuge provided sanctuary for those who killed accidentally; the arrangement of 6 + 42 = 48 reflects a precise biblical organizational system."
+  },
+  {
+    "id": 98,
+    "category": "religion",
+    "fact": "Surah 42 of the Quran is called Ash-Shura (The Consultation), comprising 53 verses revealed in Mecca.",
+    "detail": "The surah addresses the theme of divine revelation and counsel, emphasizing that matters of the community should be decided by mutual consultation (shura)."
+  },
+  {
+    "id": 99,
+    "category": "geography",
+    "fact": "Washington State was the 42nd state admitted to the United States, on November 11, 1889.",
+    "detail": "It was admitted on the same day as Montana (41st), and was followed by North Dakota (39th), South Dakota (40th) — four states admitted within months of each other."
+  },
+  {
+    "id": 100,
+    "category": "geography",
+    "fact": "New Jersey State Route 42 (the North–South Freeway) runs 9.93 miles from Atlantic City to Gloucester City, connecting the Atlantic City Expressway to I-76.",
+    "detail": "It is one of New Jersey's primary commuter routes, providing a direct link between South Jersey suburbs and Philadelphia."
+  },
+  {
+    "id": 101,
+    "category": "geography",
+    "fact": "US Route 42 runs through Ohio and Kentucky, connecting the Cincinnati metropolitan area northward through central Ohio toward Cleveland.",
+    "detail": "The route passes through Lexington, KY, and multiple Ohio cities including Xenia and Springfield over its approximately 320-mile length."
+  },
+  {
+    "id": 102,
+    "category": "geography",
+    "fact": "42nd Street in Manhattan runs east–west across the island from the Hudson River to the East River, a distance of approximately 2.5 miles.",
+    "detail": "It is one of Manhattan's widest and most commercially significant crosstown streets, anchored by Times Square to the west and Grand Central Terminal to the east."
+  },
+  {
+    "id": 103,
+    "category": "geography",
+    "fact": "The 42nd Street–Times Square subway station complex is served by 7 distinct New York City subway lines, making it the largest transit hub in the Western Hemisphere.",
+    "detail": "The complex includes four separate station buildings (Times Square, Port Authority, Bryant Park, Grand Central) connected by underground passages."
+  },
+  {
+    "id": 104,
+    "category": "geography",
+    "fact": "New Zealand's '42 Traverse' is a 46 km mountain bike trail and tramping route through the Tongariro Forest Park, named after New Zealand's original State Highway 42.",
+    "detail": "The trail passes through native podocarp forest and volcanic landscapes; it is one of New Zealand's most popular off-road cycling routes."
+  },
+  {
+    "id": 105,
+    "category": "geography",
+    "fact": "Boston, Massachusetts sits at latitude 42.36°N, making it one of the major American cities closest to the 42nd parallel.",
+    "detail": "Chicago (41.88°N), Rome (41.90°N), and Istanbul (41.01°N) all cluster near the 42nd parallel, which bisects much of the Northern Hemisphere's temperate zone."
+  },
+  {
+    "id": 106,
+    "category": "biology",
+    "fact": "Common bread wheat (Triticum aestivum) is hexaploid and has 42 chromosomes — the result of three diploid wild grass species each contributing 14 chromosomes.",
+    "detail": "The three ancestral genomes (labeled A, B, and D) combined through two separate hybridization events; this polyploidy drives wheat's high productivity and adaptability."
+  },
+  {
+    "id": 107,
+    "category": "biology",
+    "fact": "The human adult body contains approximately 42 liters of total water for a 70 kg person (roughly 60% of body weight).",
+    "detail": "Body water is distributed across intracellular fluid (~28 L), extracellular fluid (~14 L), with the balance in blood plasma; the ratio shifts with age and body composition."
+  },
+  {
+    "id": 108,
+    "category": "biology",
+    "fact": "Many cultivated hexaploid chrysanthemum (Chrysanthemum morifolium) varieties have 42 chromosomes, like wheat — the result of ancient polyploidization.",
+    "detail": "Most ornamental chrysanthemums used in horticulture are hexaploid (6x = 42), which confers larger flowers and greater genetic diversity than diploid wild relatives."
+  },
+  {
+    "id": 109,
+    "category": "biology",
+    "fact": "Cultivated oat (Avena sativa) is hexaploid with 42 chromosomes (2n = 6x = 42), comprising three ancestral diploid genomes.",
+    "detail": "Wild oat relatives include diploid species (2n=14) and tetraploid species (2n=28); the hexaploid oat provides higher yield and broader climate tolerance."
+  },
+  {
+    "id": 110,
+    "category": "biology",
+    "fact": "At 42 days of development, a human embryo is approximately 17 mm long and begins forming distinct toe rays.",
+    "detail": "Week 6–7 (days 42–49) marks the transition from embryo to early fetal stage; the embryo has recognizable limb buds, a beating heart, and early brain structures."
+  },
+  {
+    "id": 111,
+    "category": "medicine",
+    "fact": "Many fertility clinics set 42 as the upper age limit for IVF using a patient's own eggs, citing sharply declining success rates and rising miscarriage risk above this age.",
+    "detail": "After 42, egg quality and quantity decline precipitously; donor eggs can extend reproductive capability beyond this threshold."
+  },
+  {
+    "id": 112,
+    "category": "medicine",
+    "fact": "The traditional postnatal recovery period is 6 weeks (42 days), a milestone observed across many medical traditions and cultures worldwide.",
+    "detail": "The 42-day postpartum period marks physiological recovery of the uterus, hormonal stabilization, and wound healing; it is the basis for postpartum follow-up appointment scheduling."
+  },
+  {
+    "id": 113,
+    "category": "medicine",
+    "fact": "Molybdenum (element 42) target X-ray tubes are the clinical standard for mammography, as Mo Kα radiation at 17.4 keV optimally penetrates breast tissue.",
+    "detail": "The characteristic X-ray energy of molybdenum falls in the ideal range for imaging soft tissue; higher-energy X-rays would pass through without sufficient contrast."
+  },
+  {
+    "id": 114,
+    "category": "law",
+    "fact": "42 U.S.C. § 1983 is the primary federal statute allowing individuals to sue state and local government officials for violations of constitutional rights.",
+    "detail": "Enacted as part of the Civil Rights Act of 1871, it has been used in landmark cases involving police misconduct, prison conditions, and government censorship."
+  },
+  {
+    "id": 115,
+    "category": "law",
+    "fact": "Title 42 of the United States Code covers 'Public Health and Social Welfare' and contains some of the most frequently litigated sections of US federal law.",
+    "detail": "Title 42 includes statutes governing Medicare, Medicaid, civil rights enforcement, immigration detention (§ 265, the pandemic-era restriction), and social security."
+  },
+  {
+    "id": 116,
+    "category": "law",
+    "fact": "Article 42 of the United Nations Charter authorizes the Security Council to take military action — including air, sea, or land operations — to restore international peace.",
+    "detail": "Article 42 was invoked to authorize military force in Korea (1950), Iraq (1990), Libya (2011), and other conflicts; it requires a Security Council resolution."
+  },
+  {
+    "id": 117,
+    "category": "law",
+    "fact": "The 42nd Amendment to the Indian Constitution (1976) made sweeping changes including adding 'socialist' and 'secular' to the Preamble and expanding executive power.",
+    "detail": "Passed during Indira Gandhi's Emergency, it was dubbed the 'mini-constitution' for its scope; many provisions were later repealed by the 44th Amendment (1978)."
+  },
+  {
+    "id": 118,
+    "category": "film",
+    "fact": "The 42nd Academy Awards (1970) saw 'Midnight Cowboy' win Best Picture — the only X-rated film ever to receive the award.",
+    "detail": "Director John Schlesinger's film was rated X under the original MPAA system; the rating was later changed to R when standards evolved."
+  },
+  {
+    "id": 119,
+    "category": "film",
+    "fact": "'42nd Street' (1933), directed by Lloyd Bacon, is considered the first great backstage Hollywood musical and helped revive Warner Bros. during the Depression.",
+    "detail": "Its iconic overhead shots — choreographed by Busby Berkeley — invented a visual style that defined the Hollywood musical for a decade."
+  },
+  {
+    "id": 120,
+    "category": "film",
+    "fact": "Disney's 42nd animated feature film is 'Lilo & Stitch' (2002), directed by Chris Sanders and Dean DeBlois.",
+    "detail": "It grossed over $273 million worldwide and spawned three direct-to-video sequels, a TV series, and a 2024 live-action remake."
+  },
+  {
+    "id": 121,
+    "category": "film",
+    "fact": "'42' (2013), directed by Brian Helgeland, stars Chadwick Boseman as Jackie Robinson and Harrison Ford as Brooklyn Dodgers executive Branch Rickey.",
+    "detail": "The film grossed $97 million worldwide on a $40 million budget; Boseman later played Black Panther, Thurgood Marshall, and James Brown before his death in 2020."
+  },
+  {
+    "id": 122,
+    "category": "film",
+    "fact": "'The Hitchhiker's Guide to the Galaxy' (2005) stars Martin Freeman as Arthur Dent, Mos Def as Ford Prefect, and Sam Rockwell as Zaphod Beeblebrox.",
+    "detail": "The film was produced with the involvement of Douglas Adams, who died in 2001; his widow and friends oversaw production to honor his vision."
+  },
+  {
+    "id": 123,
+    "category": "television",
+    "fact": "The BBC television adaptation of 'The Hitchhiker's Guide to the Galaxy' (1981) ran for 6 episodes and starred Simon Jones as Arthur Dent.",
+    "detail": "Shot on a modest budget using innovative model work and graphics, it became a cult classic and introduced millions to Douglas Adams's universe outside of radio."
+  },
+  {
+    "id": 124,
+    "category": "television",
+    "fact": "'Doctor Who' Series 3, Episode 42 (2007) was written to unfold in real time over exactly 42 minutes, an explicit nod to the Hitchhiker's Guide.",
+    "detail": "The episode is set aboard a spaceship crashing into a star; showrunner Russell T Davies confirmed the 42-minute structure was a deliberate Douglas Adams tribute."
+  },
+  {
+    "id": 125,
+    "category": "television",
+    "fact": "In 'Lost' (2004–2010), the number 42 is the sixth and largest of the cursed Numbers (4, 8, 15, 16, 23, 42), which sum to exactly 108.",
+    "detail": "The numbers appear on the hatch, in the lottery, in the DHARMA Initiative, and are linked to the character Hugo 'Hurley' Reyes, who won the lottery using them."
+  },
+  {
+    "id": 126,
+    "category": "television",
+    "fact": "In the animated series 'Futurama,' the Planet Express ship operates at Level 42 in several episodes, as a wink to both Hitchhiker's Guide and the band Level 42.",
+    "detail": "Creator Matt Groening and writer David X. Cohen are known fans of science fiction culture and embedded multiple layers of 42 references throughout the series."
+  },
+  {
+    "id": 127,
+    "category": "film",
+    "fact": "The 1966 World Cup documentary 'Goal!' features England's historic 4–2 victory over West Germany in the final, making the score itself a form of the number.",
+    "detail": "Directed by Abbe Lévitow and Ross Devenish, it was the first football World Cup to be officially filmed in color for worldwide theatrical release."
+  },
+  {
+    "id": 128,
+    "category": "music",
+    "fact": "Level 42 is a British jazz-funk band formed in 1979 on the Isle of Wight, named directly after the answer in 'The Hitchhiker's Guide to the Galaxy.'",
+    "detail": "Their biggest hit 'Something About You' (1985) reached #6 in the UK and #12 in the US; bassist/vocalist Mark King's slap bass technique defined their sound."
+  },
+  {
+    "id": 129,
+    "category": "music",
+    "fact": "The 42nd Grammy Awards ceremony (2000) saw Carlos Santana's 'Supernatural' win Album of the Year, Record of the Year, and 6 additional awards — a record-tying 8 Grammys in one night.",
+    "detail": "Santana won alongside collaborators Rob Thomas, Wyclef Jean, and Everlast; the album spent 12 weeks at #1 and sold over 30 million copies worldwide."
+  },
+  {
+    "id": 130,
+    "category": "music",
+    "fact": "Coldplay's song '42' is the 4th track on 'Viva la Vida or Death and All His Friends' (2008), opening with the line 'Those who are dead are not dead, they're just living in my head.'",
+    "detail": "The song blends piano balladry with orchestral surges and is considered one of the most emotionally ambitious tracks on the album, which won the Grammy for Album of the Year."
+  },
+  {
+    "id": 131,
+    "category": "music",
+    "fact": "The Broadway musical '42nd Street' opened on August 25, 1980, won the Tony Award for Best Musical, and ran for 3,486 performances in its original production.",
+    "detail": "The show was revived in 2001, winning another Tony for Best Revival; composer Harry Warren's songs include 'Lullaby of Broadway' and the title number."
+  },
+  {
+    "id": 132,
+    "category": "music",
+    "fact": "Mozart composed Symphony No. 42 in F major (K. 75) in 1771 at age 15, a brief four-movement symphony written during his early Italian period.",
+    "detail": "Like many of Mozart's early symphonies, K. 75 is rarely performed today but demonstrates his rapidly developing contrapuntal technique before his major symphonic works."
+  },
+  {
+    "id": 133,
+    "category": "music",
+    "fact": "Beethoven's Opus 42 is the Notturno in D major for viola and piano, published in 1804 as an arrangement of his own Serenade Op. 8.",
+    "detail": "Beethoven authorized the arrangement for the practical reason that the viola-and-piano combination was more available in private salons than the original violin-viola-cello trio."
+  },
+  {
+    "id": 134,
+    "category": "music",
+    "fact": "The classic rhythm and blues standard '42nd Street' was first composed by Harry Warren with lyrics by Al Dubin for the 1933 Warner Bros. film of the same name.",
+    "detail": "Warren and Dubin's partnership produced some of the most enduring songs of the 1930s; '42nd Street' became the defining anthem of Manhattan's theater district."
+  },
+  {
+    "id": 135,
+    "category": "music",
+    "fact": "Pink Floyd's 'The Dark Side of the Moon' (1973) has a total runtime of approximately 42 minutes and 49 seconds, making it functionally a 42-minute album.",
+    "detail": "The album spent 937 weeks on the Billboard 200 — more than any other album in history — and has sold an estimated 45 million copies worldwide."
+  },
+  {
+    "id": 136,
+    "category": "military",
+    "fact": "The 42nd Infantry Division of the US Army, the 'Rainbow Division,' served in World War I and World War II, earning the nickname for the diverse geographic origins of its units.",
+    "detail": "In WWI, it was the first American division to see significant combat in France (1918); in WWII, it liberated the Dachau concentration camp in April 1945."
+  },
+  {
+    "id": 137,
+    "category": "military",
+    "fact": "42 Commando Royal Marines is a unit of the British Royal Marines, based at Bickleigh Barracks near Plymouth, England.",
+    "detail": "It is one of three Commando units within 3 Commando Brigade and has served in conflicts including the Falklands War (1982), Gulf War (1991), and Afghanistan (2001–2014)."
+  },
+  {
+    "id": 138,
+    "category": "military",
+    "fact": "The M42 Duster was a US Army self-propelled anti-aircraft gun system mounting twin 40mm Bofors cannons, produced from 1953 to 1959.",
+    "detail": "Used in the Korean War, Vietnam War, and Cold War defense of West Germany, the M42 was eventually replaced by surface-to-air missile systems in the anti-aircraft role."
+  },
+  {
+    "id": 139,
+    "category": "military",
+    "fact": "The 42nd Highlanders is the designation of the Black Watch (Royal Highland Regiment) of Canada, one of the most decorated infantry regiments in Canadian military history.",
+    "detail": "The regiment served with distinction in both World Wars; its distinctive red hackle (feather) distinguishes the Black Watch tartan worn in ceremonial dress."
+  },
+  {
+    "id": 140,
+    "category": "language",
+    "fact": "In Japanese, 42 is pronounced 'shini' (四二, shi-ni), which is phonetically identical to 死に (shini), meaning 'to die' — making it one of the most avoided numbers in Japan.",
+    "detail": "The tetraphobia extends to hospitals (no Room 42), product lines, and floor numbering in Japanese buildings, similar to Western avoidance of 13."
+  },
+  {
+    "id": 141,
+    "category": "language",
+    "fact": "In Mandarin Chinese, the digit 4 (四, sì) is near-homophonous with 死 (sǐ, 'death'), making 42 (四十二, sìshíèr) doubly inauspicious in Sinophone cultures.",
+    "detail": "The association is strong enough to affect real estate prices, phone number preferences, and car license plate auctions in mainland China, Hong Kong, and Taiwan."
+  },
+  {
+    "id": 142,
+    "category": "language",
+    "fact": "In Roman numerals, 42 is XLII — but in the Mayan vigesimal (base-20) numeral system, 42 is written as two dots above two dots (2×20 + 2 = 42).",
+    "detail": "The Maya used positional notation with base 20, placing dot symbols (1) and bar symbols (5) in vertical columns; 42 occupies the second position (20s) and the units position."
   }
 ]