How do bulletproof vests work? - Max G. Levy
Adults ConstructionExplore the chemistry behind what makes kevlar so strong, and how this essential synthetic fiber was invented.
Primitive Technology: Water Bellows (uses water instead of leather)
Adults ConstructionI built a Water Bellows. It’s an upside-down clay pot with an inlet valve and an outlet spout. The inlet valve is simply a hole in the pot with a leaf plastered to the inside with wet clay so that it forms a one-way flap valve.
Primitive Technology: Geopolymer Cement (Ash and Clay)
Adults ConstructionI have made wood ash cement before under the assumption that it was the calcium in the ash that gave it its cementitious properties...
Primitive Technology: Wet Season Destroys Thatched Workshop
Adults ConstructionThe thatched workshop where I produce bricks, pottery, cement and charcoal for various projects was destroyed by prolonged rain from the wet season.
How the Most Expensive Swords in the World Are Made
Adults ConstructionThis is a video about how Japanese samurai swords, aka katanas, are made – from the gathering of the iron sand, to the smelting of the steel, to the forging of the blade.
Primitive Technology: One-Way Blower Iron Smelt & Forging Experiment
Adults ConstructionI tested the one-way spinning blower in an iron smelt and it is more effective than the previous both way spinning blower.
Primitive Technology: One-Way Blower Iron Smelt & Forging Experiment
Adults ConstructionI tested the one-way spinning blower in an iron smelt and it is more effective than the previous both way spinning blower.
Primitive Technology: Crab and Fish Trap
Adults ConstructionI made a fish trap from cane and tested it over the course of a year catching various aquatic animals.
How This Guy Makes the World's Best Puzzle Boxes | Obsessed | WIRED
Adults ConstructionKagen Sound is an artisan of remarkable skill, engineering and constructing incredibly intricate puzzle boxes made entirely of wood.
Inside Japan’s Earthquake Simulator
Adults ConstructionThis is the world’s largest earthquake simulator, here’s how it works.
Primitive Technology: Volute Shaped Blower
Adults ConstructionI made a volute shaped blower where the housing for the fan is volute shaped, that is to say a widening spiral to test the effectiveness of a one way spinning impeller.
Primitive Technology: Brick and Charcoal Production
Adults ConstructionIn this video I use the thatched hut to fire bricks and make charcoal in for the first time.
The Figure 8 Knot Has Never Failed. Why?
Adults ConstructionModern roped rock climbing, one of the nerdiest sports, relies almost entirely on a single type of knot for safety: the figure eight knot.
Building a Sled | Alaska: The Next Generation
Adults ConstructionDaniel Apassingok, along with Chase and his family and friends help build a sled to help their every day lives.
Ancient Humans Made Millions Of These - We Don’t Know Why
Adults ConstructionThe Acheulean handaxe was the most common tool of early humans, but we still don’t know what the heck they used it for.
Explaining concrete while getting buried in it
Adults ConstructionConcrete = cement + sand + gravel. Cement is the most important man-made material on Earth.
Primitive Technology: Making Charcoal (3 Different Methods)
Adults ConstructionAbout This Video:
With more iron smelting experiments coming up, I demonstrate 3 different methods to make charcoal, ranked easiest to hardest.