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Isaac Newton made a Bible-based estimate
of a few thousand years. Einstein believed in a steady state, ageless
Universe. Since then, data collected from the Universe puts the
probable answer somewhere in the middle.
basic / advanced
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The Einstein equation predicts several possible ways for the Universe
to evolve in time and space. What are these models and how do they compare
with observation? basic
/ advanced
Take a tour through the chain of physical
events that cosmologists believe occurred while the expanding Universe
we observe today was very small and very young.
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There's a lot of compelling evidence for the Big Bang, but what preceded
it? The most accepted model is called Inflation, but it's not the
kind of inflation that Alan Greenspan need fear.
basic / advanced
What happens when the early universe is gummed up with string? And are
any of these scenarios testable in the near future?
basic / advanced
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