I started reading a National Geographic article related to the Big Bang. It starts these statements:
Gazing up at the stars at night, it’s easy to imagine that space goes on forever. But cosmologists know that the universe actually has limits.
First, their best models indicate that space and time had a beginning, a subatomic point called a singularity. This point of intense heat and density rapidly ballooned outward.
My first reaction was that this is a layman's approximation to...