“It is cer­tain­ly for­tu­nate for us that the num­bers (of quarks and antiquarks) are un­equal be­cause, if they had been the same, near­ly all the quarks and an­ti­quarks would have an­ni­hi­lat­ed each oth­er in the ear­ly uni­verse and left a uni­verse filled with ra­di­ation but hard­ly any mat­ter. There would then have been no galax­ies, stars, or plan­ets on which hu­man life could have de­vel­oped.”