Changes

“It [the Great Wall, composed of tens of thousands of galaxies] is far too large and too massive to have formed by the mutual gravitational attraction of its member galaxies.” M. Mitchell Waldrop, “Astronomers Go Up Against the Great Wall,” [[Science (journal)|Science]], Vol. 246, 17 November 1989, p. 885. (See also Margaret J. Geller and John P. Huchra, “Mapping the Universe,” Science, Vol. 246, 17 November 1989, pp. 897–903).<ref name=fast_binaries/>