IHWIP - Heat death assumes our universe is a closed system thermodynamically. It does not take into account the cause of the creation of our universe.<br /><br />One should ask why the universe began to exist in the first place and how so much energy became available at what is commonly called the big bang?<br /><br />Many believe in God - and Isaiah 40:26 links the existence of stars to plural forms of God's dynamic energy and power - in effect indicating our universe was created by input of energy and power.<br /><br />Simply, our universe apparently was not a closed system.<br /><br />Scientists have many models as to how our universe started with such a vast amount of available energy - thermodynamically extremely active.<br /><br />To illustrate - if your built a house, entropy would eventually cause your house to return to the most stable state - i.e. it would return to the dust, so to speak.<br /><br />On the other hand, you could continually repair, remodel or sustain your home so it would not succumb to death by entropy, so to speak.<br /><br />If you believe in God, you might ask: will God sustain our universe, or remodel it? I will not go into Biblical astronomy on this question further unless you request it.<br /><br />Strictly scientifically, our universe may not remain a closed system thermodynamically.<br /><br />Some astronomers, notably Loeb, have postulated that our universe may already be interacting with another universe beyond our visibility horizon.<br /><br />Interactions between other universes may infuse our universe with vast amounts of energy and therefore could lead to an outcome quite in contrast with the heat death model for the future of our universe.<br /><br />In fact, the collision of branes model for our universe posits a similar infusion of energy for the origin of our universe.<br /><br />The key point here bears repeating:<br /><br />Our universe may not remain a closed system thermodynamically speaking.<br /><br />One definition of entropy, btw, is the