Today I Learned 🎓

30 March 2026 22:49

TIL about David Hahn, the "Radioactive Boy Scout," who at age 17 built a functional nuclear breeder reactor in his backyard shed. He collected radioactive material from smoke detectors, old clocks, and camping lanterns, eventually creating a source so radioactive it was detected five houses away. [Source]

Today I Learned 🎓

30 March 2026 20:49

TIL about the "Dark Forest Hypothesis," which suggests the universe is like a dark forest at night. Advanced civilizations intentionally stay silent and hidden, because any species that reveals its location risks immediate destruction by older, paranoid civilizations. [Source]

Today I Learned 🎓

30 March 2026 18:49

TIL that the "Goldilocks Zone" isn't a fixed location; as a star ages and gets brighter, the habitable zone moves outward. This means planets that were once frozen can melt into oceans, while previously "Earth-like" planets are eventually baked dry. [Source]

Today I Learned 🎓

30 March 2026 17:49

TIL a drunk Ted Turner verbally attacked Rupert Murdoch and challenged him to a televised fistfight after a Murdoch-sponsored yacht collided with the yacht Turner was skippering during the Sydney to Hobart Yacht Race. [Source]

Today I Learned 🎓

30 March 2026 16:49

TIL about the white Australia policy, which was a set of racial policies that aimed to forbid people of non-European ethnic origins – primarily Asians - from immigrating to Australia. It lasted from 1901 before being disbanded in 1973. At its peak Australia was 99.4 percent white in 1961. [Source]

Today I Learned 🎓

30 March 2026 14:49

TIL In 1994, China Northwest Airlines Flight 2303 broke up in-flight, killing all 160 people onboard, after maintenance the previous night had mistakenly connected the autopilot's yaw controls to the plane’s roll-channel and vice versa. [Source]

Today I Learned 🎓

30 March 2026 11:49

TIL of Mr. Macintosh, a little dude proposed by Steve Jobs who lived in your Mac computer and would pop up once every thousand or so menu clicks then disappear unable to be found. [Source]

Today I Learned 🎓

30 March 2026 07:49

TIL there is a Guinness book record for "most prolific killer". An Indian born in 1765 named " Thug Behram" holds that record with over 931 kills. [Source]

Today I Learned 🎓

30 March 2026 05:49

TIL that 1G (first generation) cell phones used unencrypted analog radio signals, which allowed anyone with a radio receiver in the correct frequency to listen to calls. [Source]

Today I Learned 🎓

30 March 2026 03:49

TIL in 1986 after Walter Wyatt Jr.'s plane crashed into the Atlantic ocean, he swam for 15 hours while being regularly pursued by at least 3 different shark species (bull, mako, hammerhead). A shark was even in pursuit of him when he was spotted by the Coast Guard and rescued. [Source]

Today I Learned 🎓

30 March 2026 01:49

TIL Despite his level of infamy and notoriety, Jack the Ripper actually killed only 5 people [Source]

Today I Learned 🎓

29 March 2026 23:49

TIL that during the recovery of debris following the Space Shuttle Columbia disaster, several pieces of Challenger, which had broken up 17 years earlier, were also recovered from private citizens. This was due to a three-day amnesty period guaranteeing freedom from prosecution for looting. [Source]

Today I Learned 🎓

29 March 2026 20:49

TIL that while Akkadian, the language of Babylon, is a Semitic language, Sumerian, the oldest written language of the region, is an isolate that is not related to any known languages [Source]

Today I Learned 🎓

29 March 2026 20:49

TIL that Shaquille O'Neal has a net worth of $400 million. O’Neal developed 2 skyscrapers in Newark, New Jersey, was a minority owner of the NBA’s Sacramento Kings, & currently owns 150 car washes, 40 fitness clubs, a movie theater, & the Big Chicken restaurant chain. [Source]

Today I Learned 🎓

29 March 2026 19:49

TIL that New Hampshire is the only state without seat belt requirements [Source]

Today I Learned 🎓

30 March 2026 21:49

TIL that billionaire Dan Gilbert has invested $7.5 billion into Detroit, Michigan over a span of 15 years & donated $15 million to eliminate property tax debt for 20,000 homes in the city. His real estate company Bedrock owns, built, or has renovated 140 buildings in the city for adaptive reuse. [Source]

Today I Learned 🎓

30 March 2026 19:49

TIL Although Galen's understanding of human anatomy remained a standard in european medicine for over 1000 years, he based all of his knowledge on studying macaque monkeys, since dissecting human corpses was taboo in roman times. Nobody noticed this issue until Andreas Vesalius in the 16th century [Source]

Today I Learned 🎓

30 March 2026 18:49

TIL for 3 years, the Broward County Sheriff’s Office cooked up large amounts of its own crack cocaine, so it could sell it to people that deputies would then arrest for buying crack cocaine. [Source]

Today I Learned 🎓

30 March 2026 16:49

TIL after going extinct in 2000, the Pyrenean ibex was successfully cloned in 2003 with the first ever de-extinction live birth (although it died several minutes later) [Source]

Today I Learned 🎓

30 March 2026 15:49

TIL about the "Majority Illusion", a condition where opinions, beliefs, and states that are rare in real life are over-represented in social media circles, giving users the false belief that they represent the majority [Source]

Today I Learned 🎓

30 March 2026 12:49

TIL 49 US state demonyms follow some form of state-suffix convention. Only exception is Indiana whose citizens are called Hoosiers. [Source]

Today I Learned 🎓

30 March 2026 08:49

TIL Every military working dog is an NCO - in tradition at least. Some say the custom was to prevent handlers from mistreating their dogs; hence, a dog is always one rank higher than its handler. [Source]

Today I Learned 🎓

30 March 2026 05:49

TIL Canada’s federal government replaced its 40-year-old payroll system with the Phoenix automated pay system in 2011 to save $70M per year; it ultimately cost over $5.1B. [Source]

Today I Learned 🎓

30 March 2026 04:49

TIL Pedro López is a serial killer from Colombia who murdered minimum 110 people (real estimate over 300). He is wanted by Interpol and current whereabouts unknown. [Source]

Today I Learned 🎓

30 March 2026 02:49

TIL a Canadian woman who bought a lottery ticket, lost it & then forgot it until lottery officials showed up at her door to inform her that she had won the $50m jackpot. They had used credit card proof of purchase, surveillance video footage, & in-person interviews to confirm that she was the winner [Source]

Today I Learned 🎓

29 March 2026 23:49

TIL Thomas Jefferson submitted a draft in 1776 for a new Virginia Constitution, which proposed ending the slave trade into the state and, by 1800, emancipating all slaves living there. [Source]

Today I Learned 🎓

29 March 2026 22:49

TIL Napoleon asked his minister Talleyrand to organize a boar hunt. Talleyrand had servants buy two large black pigs and release them into the woods. Napoleon spent an hour chasing domesticated pigs and flew into a rage when he realized Talleyrand had made him a laughingstock of the imperial court. [Source]

Today I Learned 🎓

29 March 2026 20:49

TIL:- After the 1917 Halifax Explosion, the largest man-made explosion before the atomic bomb, Boston sent a medical relief train through a massive blizzard, arriving two days later. In gratitude, Nova Scotia has gifted Boston its official Christmas tree each year since 1971. [Source]

Today I Learned 🎓

29 March 2026 19:49

TIL that Indonesia, despite being a republic, has a special region, Yogyakarta, that is a monarchy's, and is ruled by a sultan [Source]

Today I Learned 🎓

29 March 2026 18:49

TIL that in the 17th-century Ottoman Empire, drinking coffee was a capital offense. Sultan Murad IV believed coffeehouses incited rebellion, and he would personally patrol the streets in disguise, executing anyone caught drinking or selling coffee. [Source]