1. Here's how your key works:
2. Look how quickly a traffic jam can form:
3. Here's the Berlin subway map, compared to where the trains actually run in the city:
4. Here's how dogs drink:
5. If you've ever wondered how straight lines work on curved surfaces, here's your answer:
6. Sewing machines are more cleverly designed than you probably ever imagined:
7. Here's what it looks like when you shift gears on your car:
8. And here's a peek at the inside of a grenade when you pull the pin on it:
9. Ever get a really close look at a tattoo gun in action?
10. Why your fan moves back and forth when you push down that little button on the back:
11. And here's how the zipper on your jeans works:
12. Imagine how much it'd hurt if braces worked this quickly:
13. This is what the actor inside Big Bird is up to in there:
14. Did you even realize that you could bore square holes with a round drill?
15. You can't beat a handmade pretzel, but this machine is certainly trying its best:
16. And this machine is hard at work turning wire into paper clips:
17. Have you ever given any thought to what happens when you pull the trigger on a gun?
18. Here's how a ship makes its way through the Panama Canal:
19. And, saving the best for last, here's how ice cream cones are formed:
This post was translated from German.