The Big Bang Theory The Big Bang Theory is a widely-accepted scientific model for our universe's origin and evolution, proposing that it began as a singularity around 13.8 billion years ago before expanding and cooling to form stars, galaxies, and ultimately, planets and life. Cosmic Inflation The Big Bang Theory suggests that our universe began as an incredibly hot, dense point nearly 13.8 billion years ago. This initial singularity then underwent rapid expansion and cooling, eventually leading to the formation of matter, stars, galaxies, and ultimately, planets. Cosmic Inflation is a propo
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