SortStack #1315 — 2030-01-14

By size · Order from shortest to longest.

1. A single grain of pollen 40 µm

   Pollen grains have survived intact for millions of years, letting scientists reconstruct ancient forests from lake-bed sediment.

2. The width of a human hair 0.1 mm

   Hair width is so consistent it was once a unit of precision; forensic labs still match hairs to within fractions of this.

3. The Empire State Building 443 m

   It was built in just 410 days during the Great Depression, rising about a floor a day at peak speed.

4. Mount Fuji, Japan 3.8 km

   Though it looks serene, Fuji is an active volcano that last erupted in 1707, dusting distant Tokyo with ash.

5. Mount Kilimanjaro, Tanzania 5.9 km

   You can walk from tropical jungle to arctic glaciers on its slopes, passing through five climate zones in days.

6. The Trans-Siberian Railway (length) 9.3K km

   The longest railway on Earth, a single trip from Moscow to Vladivostok takes about seven days without stopping.

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