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The ultimate fate of the universe is a topic in physical cosmology. Many possible fates are predicted by rival scientific theories, including futures of both finite and infinite duration. Once the notion that the universe started with a rapid inflation nicknamed the Big Bang became accepted by the majority of scientists, the ultimate fate of the universe became a valid cosmological question, one depending upon the physical properties of the mass/energy in the universe, its average density, and the rate of expansion. There is a growing consensus among cosmologists that the universe is flat and will continue to expand forever. The ultimate fate of the universe is dependent on the shape of the universe and what role dark energy will play as the universe ages. Deadly Space Tornadoes:http://youtu.be/6z2el1cdE2E Alien Sky Symbols:http://youtu.be/P1NpO7Rh5Lw Underground Space Station on Mars:http://youtu.be/IIivGO_1lZQ Quantum Mechanics:http://youtu.be/TfmjL1fAZ5Q Travelling to The Moon:http://youtu.be/3nggH3hfJxg Alien Planets:http://youtu.be/rBq0ZiYVDiw Monster Black Holes:http://youtu.be/RChQtlCeUgM New Secrets of Our Galaxy:http://youtu.be/QPD9mQlv7H8