SortStack #1835 — 2031-06-18

By speed · Order from slowest to fastest.

1. A slowly marching sand dune 20161.8 mm/year

   Wind pushes desert dunes forward grain by grain, swallowing roads and even villages over the decades.

2. A person walking 5 km/h

   The average person takes around 7,000 steps a day, walking the equivalent of several times around Earth in a lifetime.

3. A honeybee in flight 22 km/h

   Bees communicate the direction of flowers by dancing, encoding distance and angle in their waggling moves.

4. A galloping wildebeest 92 km/h

   Over a million wildebeest migrate in a giant loop each year, a journey so vast it is visible from space.

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. The SR-71 Blackbird 3.5K km/h

   The Blackbird leaked fuel on the ground because its panels only sealed once heat expanded them in flight.

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