Our Early Universe: Inflation, or Something Totally Wacky?

Apparently, the theory of cosmic inflation is fairly sound, by our current understanding of physics.

According to calculations, the early universe required an accelerated cosmic expansion (inflation), a speed of sound faster than the speed of light, or extremely high cosmic energy to end up with our current universe. The third model actually demands such high energy that scientists would need to invoke a theory of quantum gravity like string theory to explain the extra dimensions of space-time that would pop up.

Our Early Universe: Inflation, or Something Totally Wacky?

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