SortStack #134 — 2026-10-21

By speed · Order from slowest to fastest.

1. A three-toed sloth 240 m/h

   Sloths move so slowly that algae grows in their fur, giving them a greenish camouflage in the canopy.

2. An Olympic swimmer at full speed 9.3 km/h

   Top swimmers shave their bodies to cut drag, trimming fractions of a second that can decide a gold medal.

3. A galloping racehorse 88 km/h

   All thoroughbred racehorses descend from just three stallions imported to England centuries ago.

4. A racing bobsled 150 km/h

   Bobsled crews sprint to shove the sled at the start, then leap in, as those first seconds decide the race.

5. A helicopter at top speed 290 km/h

   A helicopter's top speed is capped because the blade tips would approach the sound barrier and lose lift.

6. A Boeing 747 cruising 920 km/h

   The 747's hump exists because the cockpit was put on an upper deck so the nose could hinge open for cargo.

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