Actually, science doesn't quite assert that. It asserts its current body of theories describing how the universe empirically works, agrees with each other reasonably well only under conditions pervailing back to a certain point in time, say X. Beyond that point those theories as we understand them can not longer be reconciled with one another, so no convincing model of what had been happening could yet be built.
The point of science is to improve the theory so they can function empirically under a greater range of circumstances, including thoaswe pervailing before X. The point of religion is to find loop holes and scream God!
The point of science is to improve the theory so they can function empirically under a greater range of circumstances, including thoaswe pervailing before X. The point of religion is to find loop holes and scream God!