SortStack #1715 — 2031-02-18

By weight · Order from lightest to heaviest.

1. A monarch butterfly 500 mg

   Despite weighing less than a paperclip, monarchs migrate up to 4,800 km from Canada to mountain forests in central Mexico.

2. A sheet of A4 printer paper 5 g

   A-series paper is metric by design: every size is exactly half the one above it, all sharing the same elegant proportions.

3. A medium pomegranate 290 g

   A single pomegranate can hold over 600 juicy seeds, called arils, and the fruit stars in myths from Greece to Persia.

4. An adult brown rat 350 g

   Rats emit ultrasonic giggles when tickled and come back for more — research that helped earn an Ig Nobel Prize.

5. The International Space Station 420 t

   Assembled over 42 flights, it circles Earth 16 times a day at 28,000 km/h, so its crew sees 16 sunrises daily.

6. The Eiffel Tower 10.1K t

   The iron grows in summer: heat expands the sun-facing side, leaning the top away from the sun and adding around 15 cm of height.

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