SortStack #3154 — 2035-01-27

By duration · Order from shortest to longest.

1. One human heartbeat at rest 798 ms

   Your heart beats roughly 100,000 times a day and around 3 billion times in a lifetime, pumping enough blood to fill an Olympic pool several times over.

2. One swing of a grandfather clock's pendulum 1 sec

   A pendulum about one metre long swings in almost exactly one second — a coincidence so neat it was once proposed as the definition of the metre.

3. A single sneeze, from sharp inhale to achoo 1.5 sec

   A sneeze can launch droplets several metres, and you can't sneeze with your eyes open without effort — the blink is part of the reflex.

4. A single round of professional boxing 3 min

   Round length was standardized by the 1867 Queensberry Rules, which also introduced gloves — before that, bare-knuckle rounds ended only with a knockdown.

5. One full rotation of the London Eye 30 min

   It moves so slowly — about 0.9 km/h — that it usually doesn't stop to let passengers on; you simply step into the moving capsule.

6. The time since Neanderthals went extinct 39.9K years

   They never fully vanished: most people outside Africa carry around 2% Neanderthal DNA, influencing skin, immunity, and even sleep patterns.

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