The concept of entropy dictates that if the universe (or any other closed system) were infinitely old, then everything inside would be at the same temperature, and thus there would be no stars and no life.
O concepto de entropía determina que se o universo (ou calquera outro sistema pechado) era infinitamente vello, entón todo o que estaba dentro del estaría á mesma temperatura, e así non habería estrelas nin vida.