# What do scientists know about the future of the universe? what dark matter is made of why the expansion of the universe is accelerating that stars will eventually burn out causing the universe to become cold and dark that galaxies spin much slower than they should based on visible matter

###### Question:

What do scientists know about the future of the universe?
what dark matter is made of
why the expansion of the universe is accelerating
that stars will eventually burn out causing the universe to become cold and dark
that galaxies spin much slower than they should based on visible matter

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