SortStack #1869 — 2031-07-22

By weight · Order from lightest to heaviest.

1. A common housefly 12 mg

   Houseflies beat their wings around 200 times per second, which produces their signature buzzing pitch near the note F.

2. A compact disc 15 g

   A CD's spiral data track is less than a micrometer wide and would stretch about five kilometers if unwound.

3. A large chicken egg 57 g

   An eggshell has up to 8,000 microscopic pores, letting the developing chick breathe right through the shell.

4. A standard Good Delivery gold bar, the kind in bank vaults 12.4 kg

   Smaller than a brick yet heavier than most pet dogs — gold is so dense this bar would fit in a shoebox with room to spare.

5. A southern elephant seal bull 3 t

   Bulls can outweigh females several times over — among the most extreme size gaps of any mammal — and dive 1,500 m deep.

6. An adult male sperm whale 45 t

   Its clicks reach about 230 decibels — the loudest animal sound on Earth — and a third of its body is one giant sonar-focusing nose.

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