Skip to content

Explore videos Browse topics Learning paths How it works

Back to the archive Browse topics Recreational & visual math Physics & space (other)A4 Paper Is Too Perfect

CGP Grey

A4 Paper Is Too Perfect

About this video

CGP Grey explains the elegant ratio of A4 and the metric paper sizes, then zooms out across scales from the Planck length to the observable universe.

Why it’s worth your time

Loved for its zoom-out tour of physical scales and recommended alongside other paper-size and scale-of-the-universe discussions.

2 HN recommenders

Read the HN discussion

Format: Explainer
HN discussion years: 2024-2026

Watch on YouTube

Playback is provided by YouTube. If a video is unavailable or blocked in your region, open it on YouTube.

Keep your curiosity going.

A few more ideas from the same corner of the archive.

Vectors | Chapter 1, Essence of linear algebra

3Blue1Brown

Ruby Conf 12 - Y Not- Adventures in Functional Programming by Jim Weirich

Confreaks

But what is the Fourier Transform? A visual introduction.

3Blue1Brown

But what is a neural network? | Deep learning chapter 1

3Blue1Brown

For the endlessly curious.

An independent guide to the HackerTube collection. Videos belong to their creators.

Data from HackerTube + open-index/hacker-news. ODC-By 1.0

Original HackerTube Privacy Terms