Placeholder Image

Subtitles section Play video

  • It was a night like any other night,

  • except here I was climbing the platonic peaks

  • like Romeo on a second date.

  • (ugh)

  • I was there for the dame.

  • She had eyes like imaginary numbers

  • and curves that went on forever.

  • Said she wanted to go home.

  • Said I could help.

  • Said the pay was good.

  • Didn't say anything about climbing a...

  • Voice: "Who's there?"

  • Manny Brot: "Manny Brot, private eye."

  • Voice: "What are you doing here?"

  • "A pretty number sent me to find a stolen dingus."

  • Voice: "Well, to enter the cave,

  • you must answer my riddles three."

  • What was it with riddles,

  • and why do they always come in threes?

  • "Is it an egg?"

  • "No. Why would it be an egg?"

  • "It's usually an egg."

  • "What can I hold in my hand, but has zero area?"

  • "Is it a dodo egg?"

  • "It's not an egg!"

  • I took out the rock that had nearly brained me before

  • and gave it a hard ponder.

  • The size of the rising bump on my conk

  • said to me that this thing had area,

  • and a lot of it.

  • But what if I carved out a triangle from this side here?

  • As any mook could see,

  • this triangle had a quarter of the area of the full triangle.

  • I did the same thing again with each of the smaller triangles.

  • Again, a quarter of the remaining area -- gone.

  • And I just kept going.

  • After an infinite number of cuts,

  • I was satisfied that my triangle had zero area.

  • A bounded shape with zero area.

  • Now, it's not often that I surprise myself,

  • but my own two mitts had created something crazy,

  • and new.

  • "Very good. (ahem)

  • Now, show me a shape with finite area,

  • but an infinitely long perimeter."

  • "Let me get this straight.

  • If I want to make a snip in the border of this shape,

  • smooth it out, and lay it on the ground ... "

  • "It would go on for ... "

  • "Wait 'til I'm through, and then you can talk.

  • It would go on forever."

  • "Are you through?"

  • "Yeah."

  • "So show me that shape then."

  • Mmm ... I hadn't been this stuck

  • since the Rubik's Cube fiasco of '58.

  • All the shapes I knew had perimeters.

  • Circles: 2πr. Triangles: sum of their sides.

  • What's this?

  • An angle.

  • An angle from heaven.

  • What if I were to pinch each side, like so.

  • A third of the way through, just so.

  • And do it again,

  • and again,

  • and again.

  • After each pinch, the perimeter got a third longer

  • because where there had been three line segments,

  • now there were four.

  • As for the area,

  • every pinch made more triangles, that's true.

  • But those triangles were getting smaller and smaller.

  • You could say that the area was converging,

  • approaching a fixed number,

  • while the perimeter was just getting bigger and bigger,

  • uncontrollably ballooning like an overindulgent birthday clown.

  • After infinity pinches, flimflam, there it was:

  • Finite area, but infinite perimeter.

  • Now that is a piece of work.

  • "Oh, you're good. (ahem) Riddle three:

  • Show me a picture that if I magnify it under my microscope,

  • I'll keep seeing the original picture,

  • no matter how much I zoom in."

  • "You're a strange little man."

  • "Thank you."

  • I was out of ideas,

  • so I looked at my muse, my complex Dora.

  • Voice: "Who's the dame?"

  • And then it hit me.

  • "She's a heart breaker, my fractal femme fatale.

  • Will she do?"

  • "Yes, she'll do just fine."

  • (lightning)

  • It was dark, and at first I thought the cave was empty,

  • but then I noticed: the box.

  • The dame had played me like a triangle.

  • She had told me she wanted to go home.

  • (Lightning)

  • What she really wanted was to bring her home here.

  • The fractals spread everywhere.

  • Most of them the same

  • no matter how deep you looked at them,

  • like Dora's mugshot.

  • Some had infinitely long perimeters,

  • others were objects with no area or volume,

  • all of them created through infinite repetition.

  • So, you wanted to know what fractals are?

  • Well, kid, they're the stuff that dreams are made of.

  • (Music)

It was a night like any other night,

Subtitles and vocabulary

Click the word to look it up Click the word to find further inforamtion about it

B1

【TED-Ed】失蹤的分形案例--亞歷克斯-羅森塔爾和喬治-扎伊丹。 (【TED-Ed】The case of the missing fractals - Alex Rosenthal and George Zaidan)

  • 319 51
    稲葉白兎 posted on 2021/01/14
Video vocabulary