SortStack #2821 — 2034-02-28

By weight · Order from lightest to heaviest.

1. 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.

2. An adult male African lion 190 kg

   A lion's roar can be heard up to 8 km away, thanks to uniquely flat, square-shaped vocal folds.

3. 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.

4. A Nimitz-class aircraft carrier 100K t

   A floating city of about 5,000 people, it can sail more than 20 years between refuelings of its nuclear reactors.

5. The CN Tower in Toronto 117.9K t

   It held the title of world's tallest free-standing structure for 32 years, and its glass floor was the world's first.

6. The Empire State Building 331K t

   Built in just 410 days during the Depression, it sat so empty at first that New Yorkers dubbed it the 'Empty State Building'.

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