... if he stepped on them in the night:

The conventional model for galaxy evolution predicts that small galaxies in the early universe evolved into the massive galaxies of today by coalescing. These nine Lego-like "building block" galaxies initially detected by Hubble likely contributed to the construction of the universe as we know it.

Of course, the question is are these lego-like because of some grand pattern of How Things Get Put Together, or do we just think of them that way to make something mind-numbingly awesome at least somewhat comprehensible?