nicomachus@nicomachus-Inspiron-N5110:~/Downloads$ unzip so_young_digital_single.zip 
Archive:  so_young_digital_single.zip
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in one of so_young_digital_single.zip or
        so_young_digital_single.zip.zip, and cannot find so_young_digital_single.zip.ZIP, period.