SortStack #1028 — 2029-04-02

By size · Order from shortest to longest.

1. A new wooden pencil 18 cm

   A single pencil can draw a line roughly 56 kilometres long before the graphite runs out.

2. A domestic cat (body length) 49 cm

   A cat has 32 muscles in each ear, letting it swivel them independently to pinpoint a sound's source.

3. A concert grand piano 2.7 m

   A grand piano's strings pull with a combined tension of around 20 tonnes, held by a single cast-iron frame.

4. The Leaning Tower of Pisa 58 m

   It began tilting during construction in the 1170s because of soft ground, and engineers only stabilised it in 2001.

5. The Great Barrier Reef (length) 2.3K km

   It is the largest living structure on Earth, built by tiny coral animals and visible from space.

6. 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.

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