SortStack #1553 — 2030-09-09

By size · Order from shortest to longest.

1. The width of a human hair 0.1 mm

   Hair width is so consistent it was once a unit of precision; forensic labs still match hairs to within fractions of this.

2. A red kangaroo (standing) 1.5 m

   Kangaroos cannot walk backwards, a trait so iconic it earned them a spot on Australia's coat of arms.

3. 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.

4. Mount Everest 8.8 km

   Its summit is made of marine limestone, lifted from an ancient seabed, so the top of the world was once underwater.

5. The Suez Canal 193 km

   It has no locks because the Mediterranean and Red Sea sit at almost exactly the same level.

6. Norway (length) 1.8K km

   Stretched out, Norway is so long that its northern tip is closer to the North Pole than to its own southern coast.

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