SortStack #3175 — 2035-02-17

By duration · Order from shortest to longest.

1. a-ha's 'Take On Me' 3.8 min

   The Norwegian band recorded it three times before it became a hit — the famous pencil-sketch video took 16 weeks of rotoscoping by hand.

2. The construction of the Sydney Opera House 14 years

   Planned as a four-year, $7 million project, it took fourteen years and $102 million — and its architect left Australia before it opened, never returning.

3. A periodical cicada's life cycle, egg to final emergence 17 years

   They spend 17 years underground and mere weeks in the sun — the prime-numbered cycle may have evolved to dodge predators' breeding rhythms.

4. The construction of the Great Pyramid of Giza 20 years

   Herodotus and modern estimates agree on roughly two decades — meaning workers placed a multi-tonne block about every five minutes of daylight.

5. The time since Vesuvius buried Pompeii 1.9K years

   The AD 79 ash preserved loaves of bread still sitting in ovens — one carbonized loaf even bears its baker's stamp.

6. A photon's journey from the Sun's core to its surface 170K years

   Energy ricochets through the dense interior for on the order of 100,000 years — then crosses the void to Earth in barely eight minutes.

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