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Ask an Astrobiologist has received nearly a thousand questions about Nibiru and 2012, with more than 200 answers posted. Please read a summary of the answers that have already been posted, use the search feature and read the FAQ’s before submitting questions on these topics.
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Question
Does the evolution of life depend on the contraction or expansion of the universe?
Not really. As you may know, the expansion and contraction of the universe is used by Astronomers to identify the beginning of time. It is thought that matter was once concentrated in an infinitesimally small volume, and the explosion, called the Big Bang, of this concentrated universe marks the beginning of the evolution of our galaxy and subsequently our Earth and its eventual life. However, because the gravitational effects of contraction or expansion of the universe are infinitesimally small compared to the gravitational effects of a planet, we do not expect evolution of life to depend on the contraction of the expansion of the universe.
March 11, 2002
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