SortStack #1749 — 2031-03-24

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 television remote control 14 cm

   Most remotes talk to the TV with invisible infrared light, the same band of energy you feel as warmth.

3. A wooden utility pole 18.5 m

   Most are pressure-treated with preservatives so they can stand outdoors for 40 years or more without rotting.

4. A Brachiosaurus (length) 22 m

   It held its neck high like a giraffe, possibly needing a heart of enormous power to pump blood up to its brain.

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 diameter of the Earth 12.7K km

   Despite feeling enormous, Earth is smoother than a billiard ball when you compare its bumps to its size.

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