A4 Paper, Metric Ratios and the Scale of the Universe
CGP Grey · Explainer · 9 min · 2021 · YouTube title: A4 Paper Is Too Perfect
Why it's here
Loved for its zoom-out tour of physical scales and recommended alongside other paper-size and scale-of-the-universe discussions.
What it covers
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.