| 401. | The Island Invented to Scam a Rich Guy | 45,655 | |
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| 402. | The Shoe So Good the Olympics Declared It Cheating | 45,850 | |
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| 403. | Why there are Zero Bridges Over the Amazon | 45,903 | |
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| 404. | How Australia Printed a Typo 46 Million Times | 46,092 | |
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| 405. | The Places Where Sneaking Over the US-Canada Border is Legal | 46,591 | |
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| 406. | What's the Most Expensive Single Thing? | 46,625 | |
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| 407. | The Twice-Weekly Flight That Got a United CEO Fired | 46,677 | |
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| 408. | A Terrible Mistake: 1 Vacuum = 1 Free Flight | 46,718 | |
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| 409. | The US' Plan for a Hypothetical War with Britain | 47,366 | |
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| 410. | The Food So Bad That It's Banned In Prison | 47,502 | |
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| 411. | The 64 Day Longest Flight in History | 47,563 | |
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| 412. | How France Bought 2,000 Trains That Were Too Wide | 47,680 | |
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| 413. | Why The London Underground Makes Itself Hotter Every Year | 47,726 | |
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| 414. | Why Farmers Can’t Legally Replant Their Own Seeds | 47,742 | |
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| 415. | The Material So Classified We Forgot How to Make It | 60,000 | |
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| 416. | Why 11 Babies Have Been Born in Antarctica | 47,968 | |
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| 417. | Why There’s Less Gravity in Hudson Bay, Canada | 47,977 | |
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| 418. | The $289,500 New York Hot Dog Stand License | 48,156 | |
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| 419. | Why Switzerland Has No Capital City | 48,232 | |
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| 420. | Why It’s (Sometimes) Illegal to Use These Colors | 48,322 | |
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| 421. | Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo | 48,330 | |
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| 422. | The Accidental Virtual Pandemic in World of Warcraft | 48,646 | |
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| 423. | The Secret Codes that Printers Put on Every Paper | 49,590 | |
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| 424. | The Real Reason NYC Is Always Covered In Scaffolding | 49,676 | |
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| 425. | Why Trading Onions on Financial Markets is Illegal | 49,979 | |
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| 426. | Why GPS Automatically Shuts Itself Down Above 1,200 mph | 50,000 | |
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| 427. | Why Samoa Skipped December 30, 2011 | 50,012 | |
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| 428. | Why Heathrow Airport Had Empty Flights to Nowhere | 50,041 | |
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| 429. | The Fake Neighborhoods on Google Maps | 50,126 | |
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| 430. | How to Read Barcodes | 50,202 | |
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| 431. | Why the European Siren is Scientifically Proven to be Better | 50,306 | |
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| 432. | Why There's Only One American Cruise Ship | 50,443 | |
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| 433. | Why North Dakota Wasn't Technically a State Until 2012 | 50,450 | |
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| 434. | We Use AI to Write the Best HAI Video Ever (HAI #200) | 50,648 | |
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| 435. | Why Saudi Arabia Imports Sand | 50,859 | |
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| 436. | Why the Smallest Piece of Land in NYC Exists | 51,260 | |
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| 437. | The Time China Had a 12 Day Long Traffic Jam | 51,796 | |
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| 438. | The Country That Used to Exist Between the US and Canada | 51,954 | |
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| 439. | How the World's Newest Language Developed | 52,172 | |
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| 440. | How One Woman Scammed Her Way Into the 2018 Olympics | 52,229 | |
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| 441. | How This Island Near Australia Was Undiscovered | 52,300 | |
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| 442. | How a Cereal Box Toy Hacked AT&T's Phone Lines | 52,385 | |
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| 443. | The Bit of East Germany That Might Still Exist | 52,479 | |
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| 444. | How North Korea Made the Perfect Counterfeit $100 Bill | 52,714 | |
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| 445. | The CIA’s Manual on How to be Annoying | 52,729 | Tutorial |
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| 446. | Why This 25,000 Foot Mountain Has Never Been Climbed | 53,000 | |
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| 447. | Why This Capital City Has a Population of Zero | 53,561 | |
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| 448. | Why Canadian Lottery Winners Must Answer a Math Question | 53,961 | |
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| 449. | The CIA's 638 Attempts to Assassinate Castro | 54,658 | |
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| 450. | Why 90% of Asians are Lactose Intolerant | 55,035 | |
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| 451. | How an Australian Prime Minister Disappeared Without a Trace | 55,338 | |
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| 452. | How Kim Jong-un Travels | 55,348 | |
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| 453. | How a Video Game Predicted the Collapse of Venezuela's Economy | 55,714 | |
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| 454. | Why the UK Runs Trains to Nowhere | 55,912 | |
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| 455. | How Global Oil Prices Were Raised $1.50 by a Drunk Trader | 56,087 | |
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| 456. | Why the UK Desperately Wants This Rock to Be Inhabitable | 56,184 | |
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| 457. | How Poland Accidentally Invaded the Czech Republic | 56,412 | |
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| 458. | How Witness Protection Manages to Keep a 100% Success Rate | 77,000 | |
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| 459. | Why These Words are Illegal | 56,596 | |
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| 460. | Why the East Ends of (Most) Cities are Poorer | 57,435 | |
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| 461. | Why Bananas Will Taste Different in a Few Years | 57,744 | |
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| 462. | The 53 Second, 22 Dollar Shortest Flight in the World | 57,843 | |
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| 463. | Why Real Dictionaries Have Fake Words | 57,945 | |
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| 464. | Why Soda Cans are Shaped Differently in Hawaii | 58,082 | |
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| 465. | Why the World's Fastest Elevator Exists | 58,156 | |
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| 466. | How Michelin Inspectors Stay Secret | 58,168 | |
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| 467. | Why This Sound is Illegal to Play | 59,249 | |
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| 468. | The Time a Senator Spoke for 24-Hours Straight | 59,864 | |
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| 469. | Why Planes Fly Over The North Pole But Not The South Pole | 59,871 | |
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| 470. | Zyzzyx Road: The Lowest-Grossing Film of All Time | 61,094 | |
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| 471. | The US Government's Trillion Dollar Coin | 61,232 | |
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| 472. | Why South Korea Will be Silent on November 14, 2019 | 61,264 | |
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| 473. | How the US Government Kept a Town of 75,000 Secret | 61,590 | |
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| 474. | The Law That Lets You Legally Steal Houses | 62,524 | |
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| 475. | Why This Coin is Illegal to Own | 62,760 | |
|
| 476. | The 360-Page Proof That 1+1=2 | 62,839 | |
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| 477. | The Global Restaurant Chain Run by North Korea | 63,302 | |
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| 478. | How the QWERTY Keyboard Broke the Chinese Language | 64,276 | |
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| 479. | The IRS' Plan to Collect Taxes After Doomsday | 64,587 | |
|
| 480. | Why This Color Doesn't Actually Exist | 64,961 | |
|
| 481. | Why the US Military Has a 26-Page Brownie Recipe | 65,712 | |
|
| 482. | How the World's Most Complicated Language Works | 69,016 | |
|
| 483. | Why the World's Largest Land Vehicle Exists | 69,636 | |
|
| 484. | North Korea's Tiny, Terrible Airline | 69,641 | |
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| 485. | You've Sent 124,882 Topic Ideas. Here are the Worst Ones. | 69,847 | |
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| 486. | How Pakistan Broke YouTube Globally for Two Hours | 70,183 | |
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| 487. | How a Missing Comma Cost a Company $5 Million | 70,260 | |
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| 488. | How A Massive Dam in China Slowed the Earth's Rotation | 70,337 | |
|
| 489. | Why Blue in Japan Looks Like Green to Americans | 70,456 | |
|
| 490. | Why 200-ish Americans Live in North Korea | 71,250 | |
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| 491. | How a Cartel Built Their Own Cell Phone Network | 71,575 | |
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| 492. | Why Antarctica Has Its Own Accent | 72,092 | |
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| 493. | The Secret Behind the Huge, Windowless Skyscraper in NYC | 73,586 | |
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| 494. | How a Fitness App Revealed Secret Military Bases | 73,899 | |
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| 495. | This is a Video About Bricks | 74,196 | |
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| 496. | What's the Shortest International Border in the World? | 75,503 | |
|
| 497. | Why Living on the Left Side of a Timezone is Dangerous | 76,115 | |
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| 498. | Why Dying is Illegal in Longyearbyen, Norway | 76,391 | |
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| 499. | Why the World's Sixth Ocean is Forming in Africa | 76,975 | |
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| 500. | Why UPS Trucks Almost Never Turn Left | 81,309 | |
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