A photon’s journey through a hydrogen molecule is the shortest event ever timed
This interval was about 247 zeptoseconds, or trillionths of a billionth of a second
![hydrogen molecule](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/10/102320_MT_zeptosecond_feat.jpg?fit=1028%2C579&ssl=1)
The shortest duration ever measured is 247 zeptoseconds — the time it takes for a particle of light, or photon, to get from one side of a hydrogen molecule (illustrated) to another.
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