The universe had a beginning, but how did it all start? Scientists believe it began with the Big Bang—a moment of unimaginable energy that set everything into motion.

Around 13.8 billion years ago, the universe was crammed into an incredibly tiny, dense, and hot point. Then, in an instant, it expanded outward. This wasn’t an explosion in space—it was space itself stretching, carrying energy and matter with it. As the universe cooled, tiny particles formed, eventually combining into atoms. These atoms clumped together under gravity to create stars, galaxies, and everything we see today.

The evidence for the Big Bang is all around us. The universe is still expanding, with galaxies drifting apart like dots on a balloon as it inflates. Scientists also detect a faint glow, known as cosmic background radiation, which is like an afterglow of that ancient event.

The Big Bang doesn’t explain what caused it, but it gives us a powerful framework for understanding the universe’s origins. From the smallest atoms to the vast galaxies, everything started from this single, mind-blowing event—an explosion of possibility that continues to shape our cosmic journey.


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