SortStack #980 — 2029-02-13

By weight · Order from lightest to heaviest.

1. The Hope Diamond 9.1 g

   The famous blue gem glows an eerie red-orange for minutes after exposure to ultraviolet light — a quirk of trace boron inside.

2. A AA alkaline battery 24 g

   Billions of AA cells are produced worldwide every year, making it the planet's most popular battery size.

3. An average adult domestic cat 4.2 kg

   Cats purr at frequencies between 25 and 150 Hz — a range some studies suggest can promote bone and tissue healing.

4. A standard car tire, without the rim 10 kg

   About a quarter of a tire's mass is not rubber at all — it is steel belts and textile cord hidden inside the carcass.

5. A giant Pacific octopus 30 kg

   It can squeeze its entire body through any gap larger than its beak — the only hard part it owns.

6. A fully loaded Triple-E class container ship 250K t

   It hauls around 18,000 containers with a crew of only about 22 — fewer people than a fast-food restaurant shift.

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