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In today's world, many
are getting shorter and shorter. Scientists have just measured
incredibly short. They recorded the shortest unit of
ever measured. It is called a zeptosecond. This is a tiny, tiny, tiny
of one second. It is a trillionth of a billionth of a second. This is a decimal
followed by 20 zeros and then a 1. The scientists study
physics at the Goethe University in Germany. They used special high-tech equipment to measure how long it takes a
to cross a hydrogen molecule. The scientists said it took 247 zeptoseconds for
to happen. This is too small for the
eye to see, and the time it takes is too
for humans to sense.
