The nature of time and the evolution of the universe is a topic of ongoing scientific inquiry and philosophical debate. The block universe model, also known as four-dimensionalism or eternalism, suggests that past, present, and future all exist simultaneously as a static four-dimensional "block" of spacetime.
In this model, events are not experienced sequentially but rather as existing at different points along the spacetime block. According to this view, the entire history of the universe is already determined and exists in its entirety, including the Big Bang and the evolution of complex structures like life.
However, it's important to note that the block universe model is just one interpretation of time and the nature of reality. Other philosophical and scientific perspectives exist, such as the presentism view that only the present moment is real or the growing block universe model that adds an open future to the block.
In terms of scientific understanding, our understanding of the early universe is based on empirical evidence, such as the cosmic microwave background radiation and the observed expansion of the universe. The Big Bang theory is widely accepted as the prevailing scientific explanation for the origin of the universe, but there are still open questions and ongoing research to refine our understanding of the earliest moments of cosmic history.
Regarding the development of life, the scientific consensus is that life on Earth originated through a gradual process of chemical evolution, leading to the emergence of simple life forms and eventually complex organisms. This understanding is based on evidence from various fields such as biology, chemistry, and paleontology.
While our scientific understanding continues to evolve, the specific details of how the universe came to be and how life emerged are still subjects of active research and investigation.