Thought for the month
"There are decades where nothing happens; and there are weeks where decades happen"
Vladimir Ilyich Lenin. 1870 – 1924
What is a zeptosecond - not a lot!
A team in Germany have measured helium photoionization with zeptosecond precision. This is
the greatest accuracy of time determination ever achieved, as well as the first
absolute determination of the timescale of photoionization.
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