SortStack #181 — 2026-12-07

By size · Order from shortest to longest.

1. A human red blood cell 8 µm

   Your body makes around 2 million of them every second to replace the ones that wear out after roughly 120 days.

2. A roasted coffee bean 8.5 mm

   A coffee 'bean' is actually the seed of a cherry-like fruit that grows on shrubs near the equator.

3. A classic incandescent light bulb 11 cm

   Its glowing filament reaches around 2,500 degrees Celsius, yet wastes most of its energy as heat, not light.

4. A blue whale 28 m

   The largest animal ever known, its heart alone is the size of a small car and beats just a few times a minute.

5. The Taj Mahal 73 m

   Its white marble appears to change colour through the day, glowing pink at dawn and golden under moonlight.

6. The Grand Canyon (length) 446 km

   The Colorado River carved it over millions of years, exposing rock layers nearly two billion years old at the bottom.

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