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Hawking summarizes nicely the four forces in the order of strength, but it's hard not to wonder whether the gravitational force, the weakest of the four, actually is the primary one. Hawking says that matter in the beginning was created out of energy by borrowing from the gravitational energy of the universe (and that this energy was necessary to counter the effects of gravity, the matter tucked tightly in a pre-Big Bang scenario). Even with a glimmer of understanding, that's heady stuff. Hawking says that a collapsed star that forms a black hole is a reverse version of the Big Bang process. Matter attracts to a singularity, which seems to be some sort of ultimate gravity, not because some mysterious center point pulls matter to itself, but because matter attracts matter and the only result is a pull to some center point. There, does matter become so dense (infinite?) that it creates the explosive power ("Infinite" matter converts to energy?) necessary to create a Big Bang scenario? Do black holes explode in the same way, thereby helping to perpetuate the cyclic nature of the universe? If matter and energy are equivalent (Hawking doesn't describe how speed of light fits into Einstein's formula) and if gravity is matter attracted to itself, what creates the attraction and how does this relate to energy? Understandably, these speculative questions, more fun than frustrating, may make a professional physicist wince.

In one essay Hawking attempts to bridge physical laws and human behavior. He says the fundamental laws of science cannot be used to deduce human behavior. Yet, it's fair to wonder. Are not the four forces termed "interaction" (which includes gravity that, while often talked about as an attractive force, involves a critical distance where another mass resists being attracted). Are not humans matter and are not human relationships with each other and the world characterized by attraction and resistance? In the free will arena, Hawking seems to say that while physical laws predetermine, it is too complex to deduce whether and how humans are predetermined and, therefore, he seems to conclude that humans have some sort of free will. We know humans have a degree of choice, save for situations like genetic disease and death that make choices for us (though we try with religion and medicine). Hawking is silent on why we choose the way we do. On what basis is choice made? Does survival and well-being have a lot to do with such choices and isn't this science based? In Epicurean fashion, we seek whatever we are attracted to (need) and we resist what we are not attracted to (don't need). Is this similarity with the physical laws of the universe a coincidence?

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luxashirt - This Witch Needs Coffee Witch Bats Halloween Retro Sunset T-Shirt

This Witch Needs Coffee Witch Bats Halloween Retro Sunset T-Shirt, hoodie, tank top, sweater, and long sleeve t-shirt

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