SortStack #251 — 2027-02-15

By size · Order from shortest to longest.

1. A grain of table salt 0.5 mm

   Each crystal is a near-perfect cube because salt's atoms stack in a rigid cubic lattice.

2. A golf ball 4.3 cm

   A golf ball has 300 to 500 dimples; they cut drag and roughly double how far a struck ball will fly.

3. The Millau Viaduct, France 2.5 km

   The tallest bridge in the world, its deck sometimes sits above the clouds that fill the valley below.

4. Aconcagua, Argentina 7 km

   The highest peak outside Asia, it can be hiked to the summit without ropes, yet thin air still kills climbers.

5. Mount Everest 8.8 km

   Its summit is made of marine limestone, lifted from an ancient seabed, so the top of the world was once underwater.

6. 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.

← All puzzles · Play today’s SortStack