We show the big bang is a coordinate singularity for a large class of k = −1 inflationary FLRW spacetimes which we have dubbed 'Milne-like.' By introducing a new set of coordinates, the big bang appears as a past boundary of the universe where the metric is no longer degenerate. In fact this past boundary is just the future lightcone at the origin of a spacetime conformal to Minkowski space. Similar to how investigating the geometrical properties of the r = 2m event horizon in Schwarzschild led to a better understanding of black holes, we believe that investigating the geometrical properties of the big bang coordinate singularity for Milne-like spacetimes will lead to a better understanding of cosmology. We show how the mathematics of these spacetimes may help illuminate certain issues associated with dark energy, dark matter, and the universe's missing antimatter.