SortStack #2134 — 2032-04-12

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 common garden ant 5 mm

   Ants can lift objects many times their own weight thanks to their tiny size and the physics of scale.

3. A grain of rice 7 mm

   Rice feeds more than half the planet, and a single plant can yield thousands of these grains.

4. The Great Pyramid of Giza 139 m

   It was the tallest human-made structure on Earth for nearly 3,800 years until medieval cathedrals surpassed it.

5. Mount Kilimanjaro, Tanzania 5.9 km

   You can walk from tropical jungle to arctic glaciers on its slopes, passing through five climate zones in days.

6. The Panama Canal 85 km

   Ships are lifted 26 metres above sea level by locks, then lowered again, crossing a continent without touching the ocean between.

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