SortStack #1126 — 2029-07-09

By size · Order from shortest to longest.

1. A tennis ball 6.7 cm

   Tennis balls are pressurised with gas and slowly go flat, which is why fresh cans hiss when opened.

2. A sperm whale 16 m

   Its head holds the largest brain of any animal that has ever lived, weighing about as much as a small person.

3. The English Channel (narrowest crossing) 33.8 km

   The first person to swim it, in 1875, took nearly 22 hours and slathered himself in porpoise grease for warmth.

4. Lake Geneva (length) 73 km

   Shared by Switzerland and France, its waters take over a decade to fully cycle through and renew.

5. The Trans-Canada Highway (length) 7.8K km

   One of the world's longest national roads, it stretches across six time zones from the Atlantic to the Pacific.

6. The Pan-American Highway (length) 30K km

   It runs almost pole to pole but for one gap: the roadless Darien jungle between Panama and Colombia.

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