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Well, what I want to tell you here is

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seeing if we can understand the composition of the Universe and to do so

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we need to know the elemental particles that conform it and

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also the interactions that exist between them.

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So, what we are going to try to do, at the beginning of the talk, is describing

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all the known particles and their reactions.

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After that, we are going to do some expeculations

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we are going to think that maybe we miss some particles in that list

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we still do not know, but that could exist and taking these possible

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particles, what we are going to try to do is associating those particles with

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new asymetries, for instance super symmetry such as another one we have that is

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called superstring, you have heared talking about it many times, and

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we will also see that all those asyetries create new

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particles. These are particles could be used to explain also

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the problem with dark matter. We will also try to

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talk a bit, since that is more or less the idea of this talk, trying to

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understand the Universe and what we do not know and see how what we

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do not know could be explained.