SortStack #2234 — 2032-07-21

By speed · Order from slowest to fastest.

1. A sea turtle cruising 3 km/h

   Sea turtles can hold their breath for hours while resting, slowing their heart to a beat every few minutes.

2. A sea lion swimming 38 km/h

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

3. A fast cricket delivery 161 km/h

   The fastest bowlers can make the ball rise off the pitch toward a batter's head in a fraction of a second.

4. The core of a jet stream 442 km/h

   Pilots ride these high-altitude winds to save fuel, which is why eastbound flights are often much quicker.

5. 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.

6. The X-15 rocket plane 7.3K km/h

   The X-15 flew to the edge of space, and several of its pilots earned astronaut wings without leaving a runway.

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