In this analogy, you can begin to understand why there is no "origin point" for the Big Bang: Nothing left the pinhead where it began; the pinhead point got exponentially bigger. This is one of ...

People talk about the universe starting with a Big Bang, but how could we possibly know anything about an event that happened billions of years ago – before our planet was even formed?

Others took notice and named his theory "big bang." LeMaitre's ideas opened more questions, many of which forced physics and astronomy together: What was that primordial atom like? Why would it ...