SortStack #449 — 2027-09-01

By speed · Order from slowest to fastest.

1. A manatee cruising 4.3 km/h

   Manatees are gentle plant-eaters so buoyant they use their heavy bones as ballast to keep from floating up.

2. A person jogging 10.8 km/h

   Humans are among the best endurance runners on Earth, able to outlast horses over very long distances in heat.

3. A sea lion swimming 38 km/h

   Sea lions can be trained to detect underwater mines and even retrieve objects for navies.

4. A bottlenose dolphin 60 km/h

   Dolphins sleep with half their brain at a time, keeping one eye open to breathe and watch for danger.

5. An IndyCar on an oval 390 km/h

   IndyCars on superspeedways run flat-out for hours, with drivers enduring forces that strain the neck lap after lap.

6. An F-22 Raptor at top speed 2.4K km/h

   The Raptor can supercruise, flying faster than sound without afterburners, sipping less fuel as it streaks along.

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