  When intense laser fields interact with nanoscale targets, strong-field
physics meets plasmonic near-field enhancement and sub-wavelength localization
of light. Photoemission spectra reflect the associated attosecond optical and
electronic response and encode the collisional and collective dynamics of the
solid. Nanospheres represent an ideal platform to explore the underlying
attosecond nanophysics because of their particularly simple geometry. This
review summarizes key results from the last decade and aims to provide the
essential stepping stones for students and researchers to enter this field.
