SortStack #3343 — 2035-08-04

By duration · Order from shortest to longest.

1. A camera speedlight flash firing at full power 1 ms

   At low power settings, flash bursts get even shorter — down to around 1/30,000 of a second, fast enough to freeze a bursting balloon mid-pop.

2. A dentist-approved tooth brushing session 2 min

   Studies show most people actually brush for about 45 seconds while believing they've done the full recommended time.

3. The average adult's actual night of sleep 6.8 h

   Smartphone-tracking studies put the global average well under the recommended eight hours — and humans sleep less than virtually any other primate.

4. The Wimbledon tennis championships 14 days

   The tournament's famous rest day, the 'Middle Sunday', was only abolished in 2022 after 145 years of tradition.

5. The Siege of Leningrad in World War II 2.4 years

   Through the blockade, scientists at the city's seed bank starved to death rather than eat their collection of edible seeds and potatoes.

6. 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.

← All puzzles · Play today’s SortStack