However, photons live on null surfaces where all events are Stranger cats Stranger Thing shirt. This means that for the photon, its own emission and absorption is a single event. Light is restricted to the surface of this cone. It cannot go off the cone any more than we can go along it. The cone itself divides spacetime into regions that specify the reachable events from the present moment, the present moment being located at the origin. Inside the top half of the light cone is your future, the bottom half, your past.
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The worldline of your existence from birth to death is inside the cone and runs through the Stranger cats Stranger Thing shirt. It should be stressed that there are an infinite number of events, or points, in spacetime and there is an equal number of light cones. So it properly said that spacetime contains a null subspace. This is suggested by the null planes pictured above. Your kid isn’t still a kid anymore. You can chill out a bit and let him deal with his own shit. He’ll get hurt, but let him. That’s how he’ll learn. Your kid does know what sex and being in a relationship means. You don’t have to use code words anymore. Your kid hates most of your relatives. He actually wants to put a bullet through some of the heads, but that’s not allowed right.