@crikeymikeydoyoulikey : "everything that has a beginning must have a cause"
Interestingly, this is challenged by certain interpretations of quantum mechanics (QM).
When Albert Einstein famously refused to believe that "God plays dice", he was referring to QM's implications of essential randomness, with further implications of non-causal happenings (including 'beginnings', such as for instance the start of a particular caesium-137 atom's decay ... or, indeed, what has become known as the Big Bang).
And, well, Einstein's reservations turned out to be misplaced. As far as we can tell (and perhaps modulo more outré interpretations such as 'many worlds' which anyway wouldn't rescue that premise in the argument for theism), events at the quantum level do have uncaused beginnings.
There are many fallacies in that argument for theism, @crikeymikeydoyoulikey; far too many to list, and some of them fairly gross. But I thought you might be interested in a particular way scientific advances falsify one of its major premises.
[Of course QM is the most successful physical theory ever. It just works - predicts and explains - better than any other theory.]