Science has explained everything religion used to.
The objection, in full
Lightning was Zeus, then it was electricity. Disease was demons, then it was germs. The history of religion is the history of retreating from explanations as science arrives. God is what's left in the gaps, and the gaps are closing.
Religion was the first attempt of the human race to explain what was going on. We can do better now.
or, in plain terms —We don't need God anymore — we have physics.
Modern science was born from theology, not in spite of it.
The conviction that nature is law-governed and intelligible — that reality answers to mathematics — is a theological inheritance. Newton, Kepler, Mendel, Lemaître, Faraday: not lapses, the founders.
Science explains how a kettle boils. It cannot explain why there is a kettle, or why the laws governing the boiling exist, or why minds exist that can know them. These are not gaps in our knowledge. They are categorically different questions.
The Big Bang itself was opposed by atheist physicists for decades because it suggested a beginning. The model that won is the one Lemaître, a Catholic priest, proposed.