Door closers: ubiquitous, yet unloved and often maladjusted Published -- Download video MP4 360p Recommendations 2:25:28 National Seminar on Gravitational Waves 23:21 The Numitron: An obvious idea that wasn't very bright 20:37 Induction cooking - but what about woks? 21:48 Lessons from a Can Opener 17:04 The Hidden Engineering of Landfills 07:46 Making an Autochrome Screen Plate 28:03 OceanGate Is Worse Than You Thought 1:03:33 This goofy fridge has a really clever design. It's also kinda terrible. 14:40 More Bizarre Attempts at Perpetual Motion Machines 25:00 Do Liberty City's Power Lines Connect To Anything? 42:57 How much ALGAE do you need to breathe? TESTED 39:03 Movies made sound with a light bulb: Sound-on-film 24:39 Back-up beepers: Obnoxious, but getting better - and spreading! 19:59 DIY Micro Steam Powerplant 27:47 Your dishwasher is better than you think (tips, tricks, and how they work) 13:12 Water powered timers hidden in public restrooms 24:55 Are We All Wrong About AI? 27:25 How American Fire Departments are Getting People Killed