Living in a hologram
Most of us have watched a holographic photograph that shows 3D image printed on a flat surface. Imagine the whole cosmos being painted on a distant celestial horizon, the three space dimensions we experience are illusion and rather hologram encoded in two dimensions. This sounds crazy but actually there are some clues in the nature that indicates the universe being a hologram. The laws of relativity forbid anything that went inside the event horizon of a black hole from coming out again. In the simplest case, the horizon is a sphere, whose surface area is larger for more massive black holes. If a piece of matter drops inside its energy is added to mass of black hole and energy conservation is upheld. Another fundamental law, the second law of thermodynamics, appears to be violated. This law summarizes the familiar observation that most processes in nature are irreversible: a teacup falls from the table and shatters, but it never gets spontaneously fixed again. In the other words, entro