That may sound harsh to some. Humans are inherently curious creatures. Science is a human endeavor to understand how nature works. Observational evidence lies at its foundation. Scientific knowledge is never perfect or absolute and never will be.
Science can only hope to produce ever-improved explanations for nature's workings.
That is, science seeks to discover and understand nature's laws and use them to understand and predict how nature works in general. However imperfect our present understanding of nature, the methods of science have led us to a better understanding of our universe than we had 100 or 1000 years ago. To deny this is to deny the existence of objective reality in our lives within this universe. I'll let you ponder that one. When asked in their ultimate forms, these questions lie beyond the realm of science.