On science shows that the universe had a beginning try :-
Alexander Vilenkin: “All the evidence we have says that the universe had a beginning”
quote from it:-
At a meeting of scientists – titled “State of the Universe” – convened last week at Cambridge University to honor Stephen Hawking’s 70th birthday, cosmologist Alexander Vilenkin of Tufts University in Boston presented evidence that the universe is not eternal after all, leaving scientists at a loss to explain how the cosmos got started without a supernatural creator. The meeting was reported in
New Scientist magazine (
Why physicists can’t avoid a creation event, 11 January 2012).
The evidence is universaly accepted by scientists, if your atherist disputes it ask him for evidence.
Just be sure you have explored the Christian arguments for desigh, complexity, morality etc etc and can quote the scierntific evidence.
hint wintery knight often quotes them so use his search function.