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Redefining Reality - The Intellectual Implications of Modern Science

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magnetic monopoles would have been massive compared<br />

to other particles, so big that they would have hampered the<br />

process <strong>of</strong> creating the sorts <strong>of</strong> particles we have around us<br />

now that make up planets and people.<br />

<br />

In short, the formation <strong>of</strong> magnetic monopoles should follow<br />

from the big bang, and they should have wreaked havoc<br />

on the formation <strong>of</strong> stable matter. Magnetic monopoles<br />

should be plentiful today, but they are at best rare and,<br />

possibly, nonexistent.<br />

<br />

<br />

<strong>The</strong> second problem has to do with the cosmological principle,<br />

according to which the universe is homogenous and isotropic. That<br />

means that there are no privileged points in the universe, and from<br />

every vantage point, the universe looks pretty much the same in<br />

large-scale structure in every direction. Deviations occur locally in<br />

small neighborhoods, but in the large, the universe looks the same<br />

in any direction.<br />

<strong>The</strong> same is true <strong>of</strong> the Earth, although it would not be true if,<br />

say, the Earth was shaped like a crescent. On a crescent, there<br />

would be certain points that were unique, and the curvature<br />

would be variable. But this is not so on a sphere from the<br />

larger perspective and not so with regard to space in the<br />

larger perspective.<br />

<br />

<br />

<strong>The</strong> problem is that with space, this shape is determined by the<br />

density <strong>of</strong> mass and energy. This is what Einstein said in the<br />

general theory <strong>of</strong> relativity: that gravitation is the curvature <strong>of</strong><br />

space-time by mass and energy. Constant curvature over all <strong>of</strong><br />

space-time means that there is equilibrium, that some sectors<br />

are not more energetic than others. But why should this be?<br />

Such equilibrium makes sense in small regions, but there are<br />

parts <strong>of</strong> the universe that are so far away from each other that<br />

there could not have been a process that brought them into<br />

equilibrium. According to the theory <strong>of</strong> relativity, the speed <strong>of</strong><br />

light is the fastest possible speed, and the regions <strong>of</strong> space are<br />

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