So that's the flap, and all the rest of the paper's left over.

What paper went into that flap?

How would you make a single flap?

We're going to learn how to make one flap.

Well, there are other ways of making a flap.

I didn't have to try to flap my wings.

It's very complicated, but it turns out they flap their wings very quickly.

And if I make the flap from the middle, it uses a full circle.

If I put the flap on the edge, it uses a half circle of paper.

And you can see there, it needs a quarter circle of paper to make a flap.

So, no matter how I make a flap, it needs some part of a circular region of paper.

If I make the flap as skinny as possible, I get to the limit of the minimum amount of paper needed.

The U.N. you know, they took 20 years just to add a flap to a tent, but I think we have some more exciting things.

And from that stick figure, I somehow have to get to a folded shape that has a part for every bit of the subject, a flap for every leg.

And we tackle this problem by building giant, dynamically scaled model robot insects that would flap in giant pools of mineral oil where we could study the aerodynamic forces.

Well, if I unfold it and go back to the crease pattern, you can see that the upper left corner of that shape is the paper that went into the flap.

Take a square. Fold it in half, fold it in half, fold it again, until it gets long and narrow, and then we'll say at the end of that, that's a flap.

And made him king over Gilead, and over the Ashurites, and over Jezreel, and over Ephraim, and over Benjamin, and over all Israel.

And made him king over Gilead, and over the Ashurites, and over Jezreel, and over Ephraim, and over Benjamin, and over all Israel.

and he made him king over Gilead, and over the Ashurites, and over Jezreel, and over Ephraim, and over Benjamin, and over all Israel.

and he made him king over Gilead, and over the Ashurites, and over Jezreel, and over Ephraim, and over Benjamin, and over all Israel.

They'll play it over, and over, and over.

And they've tried over and over and over again.

And we're seeing it over and over and over again.

And I see it over and over and over again.

I'd seen it happen over and over and over again.

And so I just kept doing this over and over and over.

And so they just do the same thing over and over and over again.

This has been replicated over and over and over again, for nearly 40 years.

And they're happy over and over again.

BF Over the top, over the top.

He read the letter over and over.

And it turns out that the insects flap their wings in a very clever way, at a very high angle of attack that creates a structure at the leading edge of the wing, a little tornado like structure called a leading edge vortex, and it's that vortex that actually enables the wings to make enough force for the animal to stay in the air.

In fact, it looks like it's the same thing repeated over and over and over again.

And this is not just specific to Ethiopia, but happens over and over, all over Africa.

But the over eating and over drinking, definitely.

I've seen this firsthand over and over again.

But the over eating and over drinking, definitely.

And I hear that story over and over.

We can go do it over and over again.

Because we kept on seeing this over and over and over again in different parts of the body.

40 million dollars over 10 years spread over 17 countries.

She grabs another one. She does this over and over.

You will put the star in starting over, and over.

And I kept thinking over and over again this question.