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. ↗
Nothing is so envied as genius, nothing so hopeless of attainment by labor alone. Though labor always accompanies the greatest genius, without the intellectual gift labor alone will do little. ↗