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A Feynman diagram of the annilation of matter and antimatter. In this interpretation the particle and the antiparticle it collides with are in fact the same particle. The particle travels forward through time with positive energy but scatters off of a boson (force-carrying particle, e.g. photon) and finds itself travelling backwards through time with negative energy. This is mathematically equivalent to the view that the particle and antiparticle are in fact two distinct particles, both travelling forward through time.Penthar
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Light--electric and magnetic fields at right angles to each otherPenthar
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Electrons exchanging virtual photon to repel each otherPenthar
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Male and female karyotypes. A karyotype is obtained from a cell that is about to divide-when the DNA exists as discrete chromosomes. Many genetic abnormalities can be confirmed by looking at a person's karyotype.Viva
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Flip all the axes to go from right-handed to left-handedPenthar
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The red and blue wave interfere constructively (boosting each other) in some spots, destructively (canceling out) in others. The white wave is the result--the sum of the other two.Penthar
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J. R. Gott's self-creating universe has a little time loopPenthar
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