
Why does the Universe have antiparticles?
Daniel and Kelly’s Extraordinary Universe
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The Coherence of Events in the Universe
The laws of physics are consistent from frame to frame, and they predict the observers tell different stories. So who you think wins the race depends on the speed you're going relative to the runners. Different points of view will see a different order of events. It means that there are multiple true stories about what happened in the universe that conflict with each other.
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