SortStack #1833 — 2031-06-16

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 Bengal tiger (body length) 2.1 m

   A tiger's roar can be heard up to three kilometres away and carries frequencies low enough to paralyse prey with fear.

3. The Statue of Liberty (heel to torch) 47 m

   Her copper skin turned green over decades as the metal oxidised; she was originally a shiny reddish-brown.

4. The Burj Khalifa, Dubai 828 m

   It is so tall that people on the ground floor can watch the sunset, then ride up and watch it set a second time.

5. Veryovkina Cave (depth) 2.2 km

   The deepest known cave on Earth, explorers need weeks underground to reach its bottom and climb back out.

6. Mount Olympus, Greece 2.9 km

   Mythical home of the Greek gods, its peak was not officially climbed by humans until 1913.

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