The concept of time is intimately linked to the fabric of our universe, and our understanding of time is based on the laws of physics as we currently know them. According to the prevailing scientific view, which is supported by the Big Bang theory, time as we experience it began at the moment of the Big Bang.
The Big Bang is considered the starting point of our universe, and it is associated with the expansion of space and the emergence of matter and energy. As the universe expanded and cooled, fundamental forces and particles formed, eventually leading to the formation of galaxies, stars, and planets, including our own.
However, it's important to note that the notion of "before" the Big Bang can be challenging to comprehend. The Big Bang represents a singularity, a point of infinite density and temperature where our current understanding of physics breaks down. As such, it is difficult to apply the concept of time in the same way before the Big Bang.
Some theories, such as certain models of cosmological inflation, suggest that the universe could have emerged from a pre-existing state or a different phase. However, the specifics of what may have preceded the Big Bang remain uncertain and are the subject of ongoing scientific investigation and debate.
In summary, while our current understanding suggests that time began with the Big Bang, the exact nature of time before that event, if it even makes sense to talk about "before" in that context, is still an area of active research and exploration.