I'm sorry, but this question is bugging me. "If space is infinite, and it expanded from a singularity, then at what point did it become infinite? Was the singularity infinite?"
If this is a daft question, then it probably shows I don't really understand the Big Bang.
I love the show - can't wait for the journey home tonight so that I can listen to the latest episode in the car. "Pamela Gay for President of The Universe", I say!

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Les