SortStack #2470 — 2033-03-14

By size · Order from shortest to longest.

1. A human red blood cell 8 µm

   Your body makes around 2 million of them every second to replace the ones that wear out after roughly 120 days.

2. A London double-decker bus 10.9 m

   The classic Routemaster's open rear platform let passengers hop on and off between stops, a hallmark of old London.

3. A Brachiosaurus (length) 22 m

   It held its neck high like a giraffe, possibly needing a heart of enormous power to pump blood up to its brain.

4. The RMS Titanic 269 m

   When launched she was the largest moving man-made object on Earth, longer than most city blocks of the day.

5. The cruising altitude of Concorde 18 km

   Concorde flew so high that passengers could see the curvature of the Earth and the dark of space above.

6. The Amazon River (length) 6.4K km

   It discharges so much water that it freshens the Atlantic Ocean more than 100 kilometres out from its mouth.

← All puzzles · Play today’s SortStack