SortStack #2244 — 2032-07-31

By duration · Order from shortest to longest.

1. Usain Bolt's 100 m world record run 9.6 sec

   Bolt ran 9.58 in Berlin 2009, hitting a top speed of 44.7 km/h — faster than the speed limit on many city streets.

2. A standard university lecture 50 min

   Attention research suggests student focus starts lapsing after 10-15 minutes — which is roughly when most lecturers are just warming up.

3. The First World War 4.3 years

   The armistice was signed at dawn but set for 11 am — nearly 2,700 men died in those final six hours, the last just one minute before peace.

4. New Horizons' journey from Earth to Pluto 9.5 years

   It left Earth as the fastest spacecraft ever launched — and Pluto was demoted from planet status just seven months into the trip.

5. 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.

6. The era of the Crusades, from the first to the fall of Acre 194.9 years

   Nine major crusades spanned 195 years — and the Fourth never reached the Holy Land at all, sacking Christian Constantinople instead.

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