What kept the cold war from being a “hot” war

SSR and USA both knew that if they would engage in a full scale nuclear war, it would simply lead to annihilation of human life. Such an event was termed as “MAD” or “Mutually Assured Destruction” Both USSR & USA didn’t want this catastrophe to happen. So they didn’t allow it to turn it into a ‘hot war.’

Hi! after fertilization occurs, the zygote goes through mitosis and then differentiation (aka specialization of cells) to have a variety of cells that perform different functions. this allows for the creation of tissues and so on, all of which were once stem cells with no specific function.i hope i !