SortStack #2218 — 2032-07-05

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. A honeybee 1.3 cm

   A honeybee beats its wings about 230 times per second, which is what gives it that distinctive buzz.

3. A red kangaroo (standing) 1.5 m

   Kangaroos cannot walk backwards, a trait so iconic it earned them a spot on Australia's coat of arms.

4. The Eiffel Tower 330 m

   It grows up to 15 centimetres taller in summer because the iron expands in the heat.

5. Great Britain, Land's End to John o' Groats 970 km

   The classic end-to-end journey covers roughly 1,400 kilometres by road, a favourite challenge for cyclists and walkers.

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.

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