Why is the Big Crunch a hypothesis and not a theory like the Big Bang?
a) The Big Crunch is based on the idea that the universe has been shrinking since day one.
b) The idea cannot be a theory if it is not based on the universe expanding.
c) The Big Crunch is a new idea and has not been around as long as the Big Bang theory.
d) In order for a hypothesis to change to a theory, scientists must discuss the idea for more than ten years.