The radiation left over from the Big Bang is the same as that in your microwave oven but very much less powerful. It would heat your pizza only to minus 271.3*C - not much good for defrosting the pizza let alone cooking it.

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I think sometimes all you need is to hear someone else say the same thing that you're going through to realize that you're not alone. I try to put some sense of hope into the songs into whatever the situation is so that it's not just dirt drudgery and a life of misery.