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.
And here's how the zipper on your jeans works:
11.
Imagine how much it'd hurt if braces worked this quickly:
12.
This is what the actor inside Big Bird is up to in there:
13.
Did you even realize that you could bore square holes with a round drill?
14.
You can't beat a handmade pretzel, but this machine is certainly trying its best:
15.
And this machine is hard at work turning wire into paper clips:
16.
Have you ever given any thought to what happens when you pull the trigger on a gun?
17.
Here's how a ship makes its way through the Panama Canal:
18.
And, saving the best for last, here's how ice cream cones are formed:
