DDO 68: A flea with smaller fleas that on him prey
  We present new photometry of the dwarf irregular galaxy DDO 68, one of the
most metal-poor and least massive dwarfs, located in the Lynx-Cancer Void. The
images were acquired with the Large Binocular Telescope in the g and r
passbands, and show unequivocally that DDO 68 has previously unknown stellar
streams related to the accretion of at least two smaller companions: a flea
with smaller fleas biting it, to put it in Jonathan Swift's words. Our data
provide direct observational evidence of multiple merging occurring at very low
galactic mass scales. We present the results of an N-body simulation of the
interaction of three dwarf galaxies which reproduces well the main
morphological features of DDO 68.
