And the density of the universe one nanosecond (a billionth of a second) after the beginning had to have the precise value of 1024 kilograms per cubic meter. If the density were larger or smaller by only 1 kilogram per cubic meter, galaxies would never have developed.18 This corresponds to a fine tuning of 1 part in 1024. The cosmological constant requires an even greater degree of fine tuning.
