Science · Mathematics

Qué es el infinito: un video que te ayudará a entenderlo en 4 minutos

What is infinity? A four-minute guide to help you understand it

B29 minVideo reviewed

Original video date: August 2, 2019 · Guide updated: September 9, 2026 · Source: BBC News Mundo

Before you watch

This preparation gives you the video context, essential vocabulary, useful expressions and listening questions. Study it first, then watch the original Spanish-language video.

Start preparing with vocabulary ↓

What this video is about

This short BBC News Mundo video asks what infinity really means and why it is more complicated than simply describing an extremely large number. It offers a compact listening exercise built around examples, quantities and limits.

Background you need

Infinity is an idea rather than an ordinary number that can be reached by counting. Mathematics uses it in different contexts, so learners should listen for distinctions between something very large, something without an end and a value that grows without limit.

Spanish video · 3:41

¿Qué es el infinito? El video que te ayudará a entenderlo en 4 minutos

Spanish captions checked

Listening speed

Video by BBC News Mundo. Spanish captions were available and checked when this guide was prepared. The transcript is not republished here.

Key vocabulary

Essential vocabulary

The example sentences below were written for language practice; they are not quotations from the source.

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el infinitoinfinity

The idea of something without an end or bound.

El infinito no es simplemente un número muy grande.

Infinity is not simply a very large number.

una cantidada quantity

An amount that can be described or measured.

La cantidad aumenta con cada paso.

The quantity increases with every step.

un límitea limit

A boundary or value approached by a sequence.

La serie puede acercarse a un límite.

The series can approach a limit.

los números naturalesnatural numbers

The counting numbers used in elementary mathematics.

Los números naturales continúan sin terminar.

Natural numbers continue without ending.

contarto count

To say numbers in sequence or determine a total.

Podríamos seguir contando indefinidamente.

We could continue counting indefinitely.

una paradojaa paradox

A statement or result that appears contradictory.

El ejemplo conduce a una paradoja difícil de imaginar.

The example leads to a paradox that is difficult to imagine.

Quick practice

Vocabulary flashcards

Think of the translation, then tap the card to reveal it.

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Useful expressions

Expressions

no tener fin— to have no end

La secuencia parece no tener fin.

tender hacia— to tend toward

Los valores pueden tender hacia un límite.

Language focus

Definitions with no es simplemente

The pattern “no es simplemente” corrects an oversimplified definition before introducing a more precise one.

El infinito no es simplemente una cifra enorme.

Ongoing possibility with poder + infinitive

“Poder” followed by an infinitive expresses what can continue or occur in a mathematical example.

Podemos seguir sumando uno.

Before you watch

Questions to keep in mind

How does the video distinguish infinity from a very large number?
Which example makes the idea of having no end easier to visualize?
Listen for verbs used to describe continuing or approaching a value.

Continue with the original

Now watch in Spanish

You have prepared the main context and language. The button opens the publisher’s original Spanish-language video in a new tab.

Open the original video on YouTube →

After watching

Reflect on what you heard

How would you define infinity in one simple Spanish sentence?
Which distinction in the video was most surprising?
Use “no tener fin” in a new example that is not about numbers.