| 301. | Why This “Zero Calorie Sweetener” Isn’t Zero Calories | 4:18 | |
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| 302. | The world's last turntable ferry has a really clever design | 4:17 | |
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| 303. | This man built his office inside an elevator | 4:15 | |
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| 304. | The sourtoe cocktail has a human toe in it | 4:14 | |
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| 305. | The world's first solar powered train | 4:14 | |
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| 306. | The US government will sell you freeze-dried urine | 4:13 | |
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| 307. | European clocks ran slow for a bit. British clocks didn't. | 4:12 | |
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| 308. | Why this British crossroads was so dangerous | 4:12 | |
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| 309. | Why old screens make a ʰᶦᵍʰ ᵖᶦᵗᶜʰᵉᵈ noise | 4:12 | |
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| 310. | Spherical houses weren't a great idea. | 4:10 | |
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| 311. | Wingwalking used to be a lot more dangerous | 4:09 | |
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| 312. | Swimming between two continents, debunked | 4:08 | |
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| 313. | Listening for Nuclear Tests at the Top of the World | 4:08 | |
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| 314. | The Battery That's Lasted 176 Years | 4:07 | |
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| 315. | The Problem With Renewable Energy (and how we're fixing it) | 4:06 | |
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| 316. | How YouTube Video Stabilization Works | 4:06 | |
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| 317. | Remote controlling an entire airport | 4:06 | |
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| 318. | ᑖᒻ ᔅᑳᑦ and ᖃᓂᐅᔮᖅᐸᐃᑦ | 4:06 | |
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| 319. | This is how zero-g flights actually work | 4:05 | |
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| 320. | How Many Languages Are There? | 4:03 | | Counter-Strike: Source
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| 321. | Zero-G Experiments on Earth: The Bremen Drop Tower | 4:02 | |
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| 322. | How one British laboratory protects the world's chocolate | 4:02 | |
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| 323. | Hill Hill Hill Hill, debunked, debunked | 4:01 | |
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| 324. | Why Can't Adults Learn Languages Like Children? | 4:00 | |
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| 325. | Fantastic Features We Don't Have In The English Language | 4:00 | |
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| 326. | The diving gondola: a strange elevator to the ocean floor | 4:00 | |
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| 327. | The giant freezer that tests winter boots | 4:00 | |
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| 328. | The Giant Cranes and Robots That Keep Civilisation Running | 3:59 | |
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| 329. | The Man Who Had Himself Taxidermied: Jeremy Bentham | 3:59 | |
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| 330. | The Lava Lamps That Help Keep The Internet Secure | 3:59 | |
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| 331. | The null hypothesis | 3:58 | |
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| 332. | The centuries-old debt that's still paying interest | 3:58 | |
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| 333. | Why Mountain Dew Rots Your Teeth More Than Coca-Cola | 3:58 | |
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| 334. | Why 2020 Started On December 30th | 3:57 | |
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| 335. | Your private messages travel under this beach | 3:57 | |
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| 336. | Launching An Entire Fireworks Display At Once | 3:56 | |
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| 337. | Why Hollywood explosions don't look like real explosions | 3:56 | |
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| 338. | Help, My Fusion Reactor's Making A Weird Noise | 3:55 | Let's Play |
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| 339. | The moiré effect lights that guide ships home | 3:54 | |
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| 340. | So You've Learned To Teleport | 3:54 | |
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| 341. | The "first internet bench" probably wasn't | 3:54 | |
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| 342. | The world's most expensive object by weight | 3:53 | |
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| 343. | How formation flying works | 3:53 | |
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| 344. | ᚛ᚈᚑᚋ ᚄᚉᚑᚈᚈ᚜ and ᚛ᚑᚌᚐᚋ᚜ | 3:52 | |
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| 345. | There's a mermaid show in Florida | 3:52 | Show |
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| 346. | I can't show you how pink this pink is. | 3:52 | Show |
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| 347. | Why “No Problem” Can Seem Rude: Phatic Expressions | 3:51 | |
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| 348. | The giant art that keeps planes quiet | 3:51 | |
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| 349. | Standing in a Hurricane in Slow Motion | 3:51 | |
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| 350. | Big Industrial Simulators in Finland | 3:49 | |
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| 351. | Gender Neutral Pronouns: They're Here, Get Used To Them | 3:49 | |
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| 352. | How the 90s VHS look works | 3:48 | |
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| 353. | We Should Let Some Wildfires Burn | 3:46 | |
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| 354. | Nobody's Exactly Sure How Much A Kilogram Is Right Now | 3:45 | Vlog |
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| 355. | Seeing Things: Visual Disturbances We All Experience | 3:44 | |
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| 356. | I Drove My Childhood Favorite Racing Game In Real Life | 3:44 | |
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| 357. | What counts as the world's steepest street? | 3:44 | |
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| 358. | The first jungle gym was meant to hack kids' brains | 3:43 | |
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| 359. | The brain-eating amoebas of Kerosene Creek | 3:42 | |
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| 360. | The town that was burned for science | 3:40 | |
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| 361. | Why Do We Have "Ye Olde"? Obsolete Letters, and the Mysteries of Ye Olde Ming | 3:40 | |
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| 362. | The giant chainmail box that stops a house dissolving | 3:39 | |
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| 363. | The Matt Gray High Five Face Off | 3:38 | |
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| 364. | The Biathlon: Firing Guns Under Pressure | 3:38 | |
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| 365. | Why Web Filters Don't Work: Penistone and the Scunthorpe Problem | 3:37 | |
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| 366. | Science vs the Weather: Salford's Energy House | 3:36 | |
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| 367. | Hold music used to sound better. Here's why. | 3:36 | |
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| 368. | How Green Screen Worked Before Computers | 3:36 | |
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| 369. | Britain's End-of-the-World Bunkers | 3:35 | |
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| 370. | These tunnels stop part of Tokyo flooding | 3:35 | |
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| 371. | Inside A Satellite Clean Room | 3:35 | |
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| 372. | How planes stay safe over the Atlantic | 3:35 | |
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| 373. | Making an international standard cup of tea | 3:34 | |
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| 374. | Making artificial earthquakes with a huge steel ball | 3:34 | |
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| 375. | Colorado has a giant freezer filled with polar ice | 3:33 | |
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| 376. | What Counts as a Word? | 3:33 | |
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| 377. | No-One Knows Who Got To The North Pole First | 3:33 | |
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| 378. | This Video Is 2D And 3D Simultaneously: the Pulfrich Effect | 3:31 | |
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| 379. | I finally rode the weird, curved German elevator. | 3:30 | |
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| 380. | 7 Illegal Things To Do In A British Election | 3:30 | |
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| 381. | The Beer Pipeline of Bruges | 3:30 | |
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| 382. | The Effective Power Bug: Why Can Weird Text Crash Your iPhone? | 3:30 | |
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| 383. | How To Read Text In Binary | 3:29 | Guide |
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| 384. | Why California's musical road sounds terrible | 3:29 | |
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| 385. | The Bizarre Plan to Drain the Mediterranean: Atlantropa | 3:29 | |
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| 386. | Connectome Scanning: Looking at the Brain's Wiring | 3:29 | |
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| 387. | There's a £100,000 coin buried under this London building | 3:28 | |
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| 388. | Unexploded Bombs off the British Coast: the SS Richard Montgomery | 3:28 | |
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| 389. | Testing the world's longest echo | 3:28 | |
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| 390. | Testing the sound mirrors that protected Britain | 3:28 | |
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| 391. | Hebocon UK: Deliberately Terrible Robot Fighting | 3:26 | |
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| 392. | Voyager 1's Getting Closer to Earth Right Now | 3:26 | |
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| 393. | What counts as the world's shortest river? | 3:26 | |
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| 394. | Driving Through Russia Without A Visa: The Saatse Boot | 3:25 | |
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| 395. | The tiny monorails that once carried James Bond | 3:24 | |
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| 396. | It’s pronounced GIF. | 3:24 | |
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| 397. | Power, Politics and Pragmatism: The British National Grid | 3:23 | |
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| 398. | How To Make Snow | 3:23 | |
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| 399. | Wheels, Bombs, and Perpetual Motion Machines | 3:23 | |
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| 400. | The World Is Slowly Running Out Of Sand | 3:22 | |
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