The nuclei in atoms and molecules move typically on femtosecond timescales (1 fs = 10
-15 s). Electrons are moving much faster and may change their position on timescales down to attoseconds (1 as = 10
-18 s). New experimental techniques allow to take movies of the electrons on this timescale and to gain deeper insight into the ultrafast dynamics of electrons in atoms, molecules and nanostructures.
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